Javascript GPA calculator, Calculate button not working

Javascript GPA calculator, Calculate button not working - javascript

I am new to JavaScript and html. I was trying to make a GPA calculator using Javascript and add it to my blog : http://comptechniqz.blogspot.in/2016/04/gpa-both-sems.html
The layout using html is working exactly fine but the Calculate button does nothing when it is clicked. Can you please help me in finding what am I doing wrong here?
Thanks
My codes :
<form name="sem1">
<table border=5 bgcolor=#BADA55 cellpadding="5" cellspacing="2">
<th>Subject</th>
<th>Grade</th>
<tr>
<td>
<select name="subCRsem1_1" >
<option value="3.5">UMA003</option>
<option value="4.5">UCB008</option>
<option value="4.5">UEC001</option>
<option value="2.5">UES009</option>
<option value="4.0">UTA007</option>
<option value="3.0">UEN002</option>
<option value="4.5">UPH004</option>
<option value="4.5">UEE001</option>
<option value="3.0">UHU004</option>
<option value="4.0">UTA008</option>
</select>
</td>
<td><input type=text size=5 name="gr1" align=top maxlength=5></td>
</tr>
<tr>
<td>
<select name="subCRsem1_2" >
<option value="3.5">UMA003</option>
<option value="4.5">UCB008</option>
<option value="4.5">UEC001</option>
<option value="2.5">UES009</option>
<option value="4.0">UTA007</option>
<option value="3.0">UEN002</option>
<option value="4.5">UPH004</option>
<option value="4.5">UEE001</option>
<option value="3.0">UHU004</option>
<option value="4.0">UTA008</option>
</select>
</td>
<td><input type=text size=5 name="gr2" align=top maxlength=5></td>
</tr>
<tr>
<td>
<select name="subCRsem1_3" >
<option value="3.5">UMA003</option>
<option value="4.5">UCB008</option>
<option value="4.5">UEC001</option>
<option value="2.5">UES009</option>
<option value="4.0">UTA007</option>
<option value="3.0">UEN002</option>
<option value="4.5">UPH004</option>
<option value="4.5">UEE001</option>
<option value="3.0">UHU004</option>
<option value="4.0">UTA008</option>
</select>
</td>
<td><input type=text size=5 name="gr3" align=top maxlength=5></td>
</tr>
<tr>
<td>
<select name="subCRsem1_4" >
<option value="3.5">UMA003</option>
<option value="4.5">UCB008</option>
<option value="4.5">UEC001</option>
<option value="2.5">UES009</option>
<option value="4.0">UTA007</option>
<option value="3.0">UEN002</option>
<option value="4.5">UPH004</option>
<option value="4.5">UEE001</option>
<option value="3.0">UHU004</option>
<option value="4.0">UTA008</option>
</select>
</td>
<td><input type=text size=5 name="gr4" align=top maxlength=5></td>
</tr>
<tr>
<td>
<select name="subCRsem1_5" >
<option value="3.5">UMA003</option>
<option value="4.5">UCB008</option>
<option value="4.5">UEC001</option>
<option value="2.5">UES009</option>
<option value="4.0">UTA007</option>
<option value="3.0">UEN002</option>
<option value="4.5">UPH004</option>
<option value="4.5">UEE001</option>
<option value="3.0">UHU004</option>
<option value="4.0">UTA008</option>
</select>
</td>
<td><input type=text size=5 name="gr5" align=top maxlength=5></td>
</tr>
<tr>
<td>
<select name="subCRsem1_6" >
<option value="3.5">UMA003</option>
<option value="4.5">UCB008</option>
<option value="4.5">UEC001</option>
<option value="2.5">UES009</option>
<option value="4.0">UTA007</option>
<option value="3.0">UEN002</option>
<option value="4.5">UPH004</option>
<option value="4.5">UEE001</option>
<option value="3.0">UHU004</option>
<option value="4.0">UTA008</option>
</select>
</td>
<td><input type=text size=5 name="gr6" align=top maxlength=5></td>
</tr>
<tr align=center>
<td colspan=3><input type="button" value="Calculate" name="CalcButton" onclick="gpaCalc()"></td>
</tr>
</table>
</form>
<br>
</center>
<br>
<script language="JavaScript">
<!--
function gpaCalc()
{
//define valid grades and their values
var grade = new array(11);
var credit = new array(11);
var gradeReceived = new array(6);
var creditHour = new array(6);
// define valid grades and their values
grade = ['A+', 'A', 'A-', 'B', 'B-', 'C', 'C-', 'E', 'F', 'I', 'X'];
credit = [10, 10, 9, 8, 7, 6, 5, 2, 0, 0, 0];
// retrieve user input
gradeReceived[0] = document.sem1.gr1.value;
gradeReceived[1] = document.sem1.gr2.value;
gradeReceived[2] = document.sem1.gr3.value;
gradeReceived[3] = document.sem1.gr4.value;
gradeReceived[4] = document.sem1.gr5.value;
gradeReceived[5] = document.sem1.gr6.value;
// Allocate credits per subject
creditHour[0] = document.sem1.subCRsem1_1[document.sem1.subCRsem1_1.selectedIndex].value;
creditHour[1] = document.sem1.subCRsem1_2[document.sem1.subCRsem1_2.selectedIndex].value;
creditHour[2] = document.sem1.subCRsem1_3[document.sem1.subCRsem1_3.selectedIndex].value;
creditHour[3] = document.sem1.subCRsem1_4[document.sem1.subCRsem1_4.selectedIndex].value;
creditHour[4] = document.sem1.subCRsem1_5[document.sem1.subCRsem1_5.selectedIndex].value;
creditHour[5] = document.sem1.subCRsem1_6[document.sem1.subCRsem1_6.selectedIndex].value;
// calculate gpa
var totalGP = 0, GPA, totalHour=0;
var i, j, validGrade=0;
for(i=0; i<6; i++)
{
for(j=0; j<11;j++)
{
if(gradeReceived[i]==grade[j])
{
validGrade=1;
break;
}
}
if(validGrade==1)
{
totalGP+=credit[j]*creditHour[i];
totalHour+=creditHour[i];
}
else
{
alert("Error- Please use A+, A, A-, B, B-, C, C-, E, F, I or X in grades " );
return 0;
}
}
GPA=totalGP/totalHour;
alert("gpa = " + eval(GPA));
return 0;
}
//-->
</script>

caps your Array.
function gpaCalc()
{
//define valid grades and their values
var grade = new array(11); <-------- array has Caps in the A. should be Array(11) for all;
var credit = new array(11);
var gradeReceived = new array(6);
var creditHour = new array(6);
[UPDATE]
Change this part of your javascript
if(validGrade==1)
{
totalGP+=credit[j]*creditHour[i];
totalHour+=creditHour[i];
}
to this:
if(validGrade==1)
{
totalGP+=credit[j]*creditHour[i];
totalHour+=parseFloat(creditHour[i]);
}

Related

How to select only one row in table with checkbox

I have a table with x numbers of rows and 4 columns, one column is checkbox and other three are readonly selectboxs. I want the user to select just 1 row to be editable by checking checkbox in first column then if he check another checkbox in another row, the checkbox he previously checked get unchecked and row get readonly again.
So I want the user to select 1 row only to edit and others be readonly.
here is my code but it is not working.
$(document).ready(function(){
$('.col1, .col2, .col3').attr('disabled', true)
selectRow();
$('.tbl').on('change', '.selectRow', selectRow);
function selectRow() {
$('.tbl tbody tr').each(function () {
$(this).find('.selectRow').each(function () {
var checkedRow = $(this).closest('tr').find('input:checkbox:checked'),
col1 = $(this).closest('tr').find('.col1'),
col2 = $(this).closest('tr').find('.col2'),
col3 = $(this).closest('tr').find('col3');
if (checkedRow){
$('.col1, .col2, .col3').removeAttr('disabled')
checkedRow.siblings().prop('checked', false);
}else{
$('.col1, .col2, .col3').attr('disabled', true)
checkedRow.siblings().prop('checked', false);
}
});
});
}
});
<table class="tbl">
<tr>
<td><input type="checkbox" name="check1" class = "selectRow" /> </td>
<td>
<select class="col1">
<option id="col1o1">A</option>
<option id="col1o2">B</option>
<option id="col1o3">C</option>
<option id="col1o4">E</option>
</select>
</td>
<td>
<select class="col2">
<option id="col2o1">A</option>
<option id="col2o2">B</option>
<option id="col2o3">C</option>
<option id="col2o4">E</option>
</select>
</td>
<td>
<select class="col3">
<option id="col3o1">A</option>
<option id="col3o2">B</option>
<option id="col3o3">C</option>
<option id="col3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" /> </td>
<td>
<select class="s1">
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2">
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3">
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" /> </td>
<td>
<select class="s1">
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2">
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3">
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
</table>
this is my code:

Without jQuery and using event delegation things may be somewhat simpler:
document.addEventListener(`click`, handle);
// disable all selectors initially
document.querySelectorAll(`td select`)
.forEach(s => s.setAttribute(`disabled`, true));
function handle(evt) {
// only do something if a checkbox was clicked
if (evt.target.type === `checkbox`) {
const isChecked = evt.target.checked;
const selectedRow = evt.target.closest(`tr`);
// reset checkboxes, row coloring and disabled state
document.querySelectorAll(`input[type='checkbox']`)
.forEach(cb => {
cb.checked = cb !== evt.target ? false : isChecked;
const row = cb.closest(`tr`);
row.classList[isChecked && row === selectedRow ?
`add` : `remove`](`selected`);
[...row.querySelectorAll(`select`)].filter(r => r !== selectedRow)
.forEach(s => s.setAttribute(`disabled`, true));
selectedRow.querySelectorAll(`select`)
.forEach(s => s[isChecked ?
`removeAttribute` : `setAttribute`](`disabled`, true));
});
}
}
body {
margin: 2rem;
}
tr.selected {
background-color: lightgreen;
}
<table class="tbl">
<tr>
<td><input type="checkbox" name="check1" class="selectRow" /> </td>
<td>
<select class="col1">
<option id="col1o1">A</option>
<option id="col1o2">B</option>
<option id="col1o3">C</option>
<option id="col1o4">E</option>
</select>
</td>
<td>
<select class="col2">
<option id="col2o1">A</option>
<option id="col2o2">B</option>
<option id="col2o3">C</option>
<option id="col2o4">E</option>
</select>
</td>
<td>
<select class="col3">
<option id="col3o1">A</option>
<option id="col3o2">B</option>
<option id="col3o3">C</option>
<option id="col3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" /> </td>
<td>
<select class="s1">
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2">
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3">
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" /> </td>
<td>
<select class="s1">
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2">
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3">
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
</table>
Here's an even more simplified version, acting on the table rows
document.addEventListener(`click`, handle);
// create the table dynamically to keep demo lean
createTable();
function handle(evt) {
if (evt.target.type === `checkbox`) {
const selectedRow = evt.target.closest(`tr`);
document.querySelectorAll(`tr`)
.forEach( row => {
// not selected
if (row !== selectedRow) {
row.querySelector(`[type=checkbox]`).checked = false;
row.classList.remove(`selected`);
return row.querySelectorAll(`select`)
.forEach(s => s.setAttribute(`disabled`, true));
}
// selected
row.classList[[`remove`, `add`][+evt.target.checked]](`selected`);
row.querySelectorAll(`select`).forEach(s =>
s[`${[`set`,`remove`][+evt.target.checked]}Attribute`](`disabled`, true));
});
}
}
function createTable() {
const table = document.createElement(`table`);
const repeat = (str, n) => Array(n + 1).join(str);
const select = `<td><select>
<option>A</option>
<option>B</option>
<option>C</option>
<option>E</option></select></td>`;
const row = `<tr>
<td><input type="checkbox" /></td>
${repeat(select, 3)}</tr>`;
table.insertAdjacentHTML(`beforeend`, repeat(row, 3));
document.body.appendChild(table);
// disable all selectors initially
document.querySelectorAll(`td select`)
.forEach(s => s.setAttribute(`disabled`, true));
}
body {
margin: 2rem;
}
tr.selected {
background-color: lightgreen;
}
tr td:nth-child(1) {
padding-right: 6px;
}

The issue is because checkedRow holds a jQuery object. When you use that in an if condition it will always equate to true. You instead need to get the checked property from that element and use that in the condition instead.
Also note that the logic can be made much more succinct and extensible through the use of common selectors instead of incremental ones. In addition, you should look to add the disabled attribute to the HTML directly. Adding it via JS means that there will be a visible flash where the element is loaded as enabled, then when the DOM loads it will be disabled which is not good for your UX.
jQuery($ => {
selectRow();
$('.tbl').on('change', '.selectRow', selectRow);
function selectRow() {
$('.tbl tbody tr').each(function() {
let $row = $(this);
let $checkbox = $row.find('.selectRow');
$row.find('select').prop('disabled', !$checkbox.prop('checked'));
});
}
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table class="tbl">
<tr>
<td><input type="checkbox" name="check1" class="selectRow" /> </td>
<td>
<select class="col1" disabled="disabled">
<option id="col1o1">A</option>
<option id="col1o2">B</option>
<option id="col1o3">C</option>
<option id="col1o4">E</option>
</select>
</td>
<td>
<select class="col2" disabled="disabled">
<option id="col2o1">A</option>
<option id="col2o2">B</option>
<option id="col2o3">C</option>
<option id="col2o4">E</option>
</select>
</td>
<td>
<select class="col3" disabled="disabled">
<option id="col3o1">A</option>
<option id="col3o2">B</option>
<option id="col3o3">C</option>
<option id="col3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" class="selectRow" /> </td>
<td>
<select class="s1">
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2">
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3">
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" class="selectRow" /> </td>
<td>
<select class="s1">
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2">
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3">
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
</table>

This works great! uncheck all checkboxes except the one having current focus '.tbl [type="checkbox"]:not(:focus)' then manipulate the select boxes
$(document).ready(function(){
$('.tbl [type="checkbox"]').on('click', function() {
$('.tbl [type="checkbox"]:not(:focus)').prop('checked', false);
$('.tbl select').attr('disabled', true);
$(this).parent().parent().find('select').attr('disabled', !$(this).prop('checked'));
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table class="tbl">
<tr>
<td><input type="checkbox" name="check1" class = "selectRow" /> </td>
<td>
<select class="col1" disabled>
<option id="col1o1">A</option>
<option id="col1o2">B</option>
<option id="col1o3">C</option>
<option id="col1o4">E</option>
</select>
</td>
<td>
<select class="col2" disabled>
<option id="col2o1">A</option>
<option id="col2o2">B</option>
<option id="col2o3">C</option>
<option id="col2o4">E</option>
</select>
</td>
<td>
<select class="col3" disabled>
<option id="col3o1">A</option>
<option id="col3o2">B</option>
<option id="col3o3">C</option>
<option id="col3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" /> </td>
<td>
<select class="s1" disabled>
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2" disabled>
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3" disabled>
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
<br>
<tr>
<td><input type="checkbox" name="check1" /> </td>
<td>
<select class="s1" disabled>
<option id="s1o1">A</option>
<option id="o2">B</option>
<option id="o3">C</option>
<option id="o4">E</option>
</select>
</td>
<td>
<select class="s2" disabled>
<option id="s2o1">A</option>
<option id="s2o2">B</option>
<option id="s2o3">C</option>
<option id="s2o4">E</option>
</select>
</td>
<td>
<select class="s3" disabled>
<option id="s3o1">A</option>
<option id="s3o2">B</option>
<option id="s3o3">C</option>
<option id="s3o4">E</option>
</select>
</td>
</tr>
</table>

Javascript onclick submit button issues

I'm working on validating user information via a form. I made a simple user information form and I cannot get the submit button to call the javascript fuction in the head. I do not know if I structured something incorrectly. I looked at the script in the head but I just cannot find the issue. Can someone help me find the issue with my submit button? Below, I have pasted my entire webpage for clarity.
<!DOCTYPE html>
<html>
<head>
<script>
alert("Hello, World!");
fucntion getResults()
{
var name = document.getElementById("name").value;
var address = document.getElementById("address").value;
var city = document.getElementById("city").value;
var gender = document.getElementById("gender").value;
var age = document.myform.age.option[document.myform.age.selectedIndex].value;
var state = document.myform.state.option[document.myform.state.selectedIndex].value;
var checkboxes = document.getElementsByName('box');
var selected = [];
for (var i=0; i<checkboxes.length; i++) {
if (checkboxes[i].checked) {
selected.push(checkboxes[i].value);
}
}
// var zip = document.getElementById("zip").vaule;
if(name == "")
{
alert("You must supply a full name!");
}
if(address == "")
{
alert("You must supply an address!");
}
if(city == "")
{
alert("You must supply a city!");
}
if(gender == "")
{
alert("You must supply a gender!");
}
if(age == "")
{
alert("You must supply an age!")
}
if(state == "")
{
alert("You must supply a state!")
}
if(selected.length < 1)
{
alert("You must supply a checked box for how you found my page!")
}
/* if(zip == "" || zip.length > 5 || /^[0-9]+$.test(zip))
{
alert("You must supply zip code!");
} */
document.getElementById("results").innerHTML = "Your name is " + name + ". You at this addresss " + address + "in this city " + city + "in this state " + state + ". Your gender is " + gender + ". You are " + age + "years old, and you found my webpage through this/these means " + selected.toString(); + "."
}
</script>
</head>
<body>
<form name="myform" id="myform">
<table border="3">
<tr>
<th>User Information Form</th>
</tr>
<tr>
<td>Full Name:</td>
<td>
<input type="text" id="name">
</td>
</tr>
<tr>
<td>Address:</td>
<td>
<input type="text" id="address">
</td>
</tr>
<tr>
<td>State:</td>
<td>
<select name="state" id="state">
<option value="AL">Alabama</option>
<option value="AK">Alaska</option>
<option value="AZ">Arizona</option>
<option value="AR">Arkansas</option>
<option value="CA">California</option>
<option value="CO">Colorado</option>
<option value="CT">Connecticut</option>
<option value="DE">Delaware</option>
<option value="DC">District Of Columbia</option>
<option value="FL">Florida</option>
<option value="GA">Georgia</option>
<option value="HI">Hawaii</option>
<option value="ID">Idaho</option>
<option value="IL">Illinois</option>
<option value="IN">Indiana</option>
<option value="IA">Iowa</option>
<option value="KS">Kansas</option>
<option value="KY">Kentucky</option>
<option value="LA">Louisiana</option>
<option value="ME">Maine</option>
<option value="MD">Maryland</option>
<option value="MA">Massachusetts</option>
<option value="MI">Michigan</option>
<option value="MN">Minnesota</option>
<option value="MS">Mississippi</option>
<option value="MO">Missouri</option>
<option value="MT">Montana</option>
<option value="NE">Nebraska</option>
<option value="NV">Nevada</option>
<option value="NH">New Hampshire</option>
<option value="NJ">New Jersey</option>
<option value="NM">New Mexico</option>
<option value="NY">New York</option>
<option value="NC">North Carolina</option>
<option value="ND">North Dakota</option>
<option value="OH">Ohio</option>
<option value="OK">Oklahoma</option>
<option value="OR">Oregon</option>
<option value="PA">Pennsylvania</option>
<option value="RI">Rhode Island</option>
<option value="SC">South Carolina</option>
<option value="SD">South Dakota</option>
<option value="TN">Tennessee</option>
<option value="TX">Texas</option>
<option value="UT">Utah</option>
<option value="VT">Vermont</option>
<option value="VA">Virginia</option>
<option value="WA">Washington</option>
<option value="WV">West Virginia</option>
<option value="WI">Wisconsin</option>
<option value="WY">Wyoming</option>
</select>
</td>
</tr>
<tr>
<td>City:</td>
<td>
<input type="text" id="city">
</td>
</tr>
<!-- <tr>
<td>Zip Code:</td>
<td>
<input type="text" id="zip">
</td>
</tr> -->
<tr>
<td>Gender:</td>
<td>
Male: <input type="radio" name="gender" id="gender" value="male">
<br>
Female: <input type="radio" name="gender" id="gender" value="female">
<br>
Intersex: <input type="radio" name="gender" id="gender" value="intersex">
<br>
Other: <input type="radio" name="gender" id="gender" value="other">
</td>
</tr>
<tr>
<td>Age:</td>
<td>
<select>
<script>
for(i = 0; i < 101; i++)
{
document.writeln("<option value='" + i + "'>" + i + " </option>");
}
</script>
</select>
</td>
</tr>
<tr>
<td>How did you find my page?<br>(Check as many that apply)</td>
<td>
Friend:<input type="checkbox" id="box" value="friend">
<br>
Co-Worker:<input type="checkbox" id="box" value="coworker">
<br>
Family:<input type="checkbox" id="box" value="family">
<br>
Internet:<input type="checkbox" id="box" value="internet">
<br>
Maganize:<input type="checkbox" id="box" value="magazine">
<br>
Ad:<input type="checkbox" id="box" value="ad">
<br>
Other:<input type="checkbox" id="box" value="other">
<br>
</td>
</tr>
<tr>
<td>
<input type="button" value="Submit" onclick="getResults()">
</td>
<td>
<input type="reset" value="Reset">
</td>
</tr>
</table>
</form>
<p id="results"></p>
</body>
</html>

You have i typo error defining function getResults
just fix the function definition and i guess everything will be ok
Regards
Yes you have several others errors:
set form fields name
access them via respective names.
You can check my fix here
<!DOCTYPE html>
<html>
<head>
<script>
alert("Hello, World!");
function getResults()
{
var name = document.getElementById("name").value;
var address = document.getElementById("address").value;
var city = document.getElementById("city").value;
var gender = document.getElementById("gender").value;
var age = document.myform.age.value;
var state = document.myform.state.value;
var checkboxes = document.myform.referbox;
var selected = [];
for (var i=0; i<checkboxes.length; i++) {
if (checkboxes[i].checked) {
selected.push(checkboxes[i].value);
}
}
// var zip = document.getElementById("zip").vaule;
if(name == "")
{
alert("You must supply a full name!");
}
if(address == "")
{
alert("You must supply an address!");
}
if(city == "")
{
alert("You must supply a city!");
}
if(gender == "")
{
alert("You must supply a gender!");
}
if(age == "")
{
alert("You must supply an age!")
}
if(state == "")
{
alert("You must supply a state!")
}
if(selected.length < 1)
{
alert("You must supply a checked box for how you found my page!")
}
/* if(zip == "" || zip.length > 5 || /^[0-9]+$.test(zip))
{
alert("You must supply zip code!");
} */
document.getElementById("results").innerHTML = "Your name is " + name + ". You at this addresss " + address + "in this city " + city + "in this state " + state + ". Your gender is " + gender + ". You are " + age + "years old, and you found my webpage through this/these means " + selected.toString(); + "."
}
</script>
</head>
<body>
<form name="myform" id="myform">
<table border="3">
<tr>
<th>User Information Form</th>
</tr>
<tr>
<td>Full Name:</td>
<td>
<input type="text" id="name">
</td>
</tr>
<tr>
<td>Address:</td>
<td>
<input type="text" id="address">
</td>
</tr>
<tr>
<td>State:</td>
<td>
<select name="state" id="state">
<option value="AL">Alabama</option>
<option value="AK">Alaska</option>
<option value="AZ">Arizona</option>
<option value="AR">Arkansas</option>
<option value="CA">California</option>
<option value="CO">Colorado</option>
<option value="CT">Connecticut</option>
<option value="DE">Delaware</option>
<option value="DC">District Of Columbia</option>
<option value="FL">Florida</option>
<option value="GA">Georgia</option>
<option value="HI">Hawaii</option>
<option value="ID">Idaho</option>
<option value="IL">Illinois</option>
<option value="IN">Indiana</option>
<option value="IA">Iowa</option>
<option value="KS">Kansas</option>
<option value="KY">Kentucky</option>
<option value="LA">Louisiana</option>
<option value="ME">Maine</option>
<option value="MD">Maryland</option>
<option value="MA">Massachusetts</option>
<option value="MI">Michigan</option>
<option value="MN">Minnesota</option>
<option value="MS">Mississippi</option>
<option value="MO">Missouri</option>
<option value="MT">Montana</option>
<option value="NE">Nebraska</option>
<option value="NV">Nevada</option>
<option value="NH">New Hampshire</option>
<option value="NJ">New Jersey</option>
<option value="NM">New Mexico</option>
<option value="NY">New York</option>
<option value="NC">North Carolina</option>
<option value="ND">North Dakota</option>
<option value="OH">Ohio</option>
<option value="OK">Oklahoma</option>
<option value="OR">Oregon</option>
<option value="PA">Pennsylvania</option>
<option value="RI">Rhode Island</option>
<option value="SC">South Carolina</option>
<option value="SD">South Dakota</option>
<option value="TN">Tennessee</option>
<option value="TX">Texas</option>
<option value="UT">Utah</option>
<option value="VT">Vermont</option>
<option value="VA">Virginia</option>
<option value="WA">Washington</option>
<option value="WV">West Virginia</option>
<option value="WI">Wisconsin</option>
<option value="WY">Wyoming</option>
</select>
</td>
</tr>
<tr>
<td>City:</td>
<td>
<input type="text" id="city">
</td>
</tr>
<!-- <tr>
<td>Zip Code:</td>
<td>
<input type="text" id="zip">
</td>
</tr> -->
<tr>
<td>Gender:</td>
<td>
Male: <input type="radio" name="gender" id="gender" value="male">
<br>
Female: <input type="radio" name="gender" id="gender" value="female">
<br>
Intersex: <input type="radio" name="gender" id="gender" value="intersex">
<br>
Other: <input type="radio" name="gender" id="gender" value="other">
</td>
</tr>
<tr>
<td>Age:</td>
<td>
<select name="age">
<script>
for(i = 0; i < 101; i++)
{
document.writeln("<option value='" + i + "'>" + i + " </option>");
}
</script>
</select>
</td>
</tr>
<tr>
<td>How did you find my page?<br>(Check as many that apply)</td>
<td>
Friend:<input type="checkbox" name="referbox" id="box" value="friend">
<br>
Co-Worker:<input type="checkbox" name="referbox" id="box" value="coworker">
<br>
Family:<input type="checkbox" name="referbox" id="box" value="family">
<br>
Internet:<input type="checkbox" name="referbox" id="box" value="internet">
<br>
Maganize:<input type="checkbox" name="referbox" id="box" value="magazine">
<br>
Ad:<input type="checkbox" name="referbox" id="box" value="ad">
<br>
Other:<input type="checkbox" name="referbox" id="box" value="other">
<br>
</td>
</tr>
<tr>
<td>
<input type="button" value="Submit" onclick="getResults()">
</td>
<td>
<input type="reset" value="Reset">
</td>
</tr>
</table>
</form>
<p id="results"></p>
</body>
</html>

You misspelled function as fucntion.
Hope that fixes it.

Change type="button" to type="submit".

JQuery does not work but last element in all browsers

I am writing a web application for capturing applicant data. I am using JQuery for hiding and showing html tables. The code snippet is
<script type="text/javascript" src="jquery.min.js"></script>
<script language="javascript" type="text/javascript">
function hideDD(){
var gndr = $('#gender').val();
if(gndr=="Female"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
var cat = $('#category').val();
if(cat=="SC" || cat=="ST"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
var xsrv = $('#exsrv').val();
if(xsrv=="Yes"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
var PD = $('#PWDPH').val();
if(PD=="Yes"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
}
and the html part is
<tr>
<td bgcolor="#FFF3D5">5. Gender :<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="gender" id="gender" onclick="hideDD()">
<option value="">Select</option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
<!-- <div id="gender">
Please select whichever is applicable to you <select name="gender" id="gender">
<option value="">Select</option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</div> -->
</tr>
<tr>
<td bgcolor="#FFF3D5">6. Marital Status :<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="maritalstatus" id="maritalstatus">
<option value="">Select</option>
<option value="Married">Married</option>
<option value="Unmarried">Unmarried</option>
<option value="Widow">Widow</option>
<option value="Divorced">Divorced</option>
<option value="Judicially separated and not married">Judicially separated and not married</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">7. Date of Birth: <span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><input name="dateofbirth" type="text" id="dateofbirth" value="<?php echo "$rs1->dateofbirth" ?>" readonly /><span class="style2">(yyyy/mm/dd)</span>
Your age(as on 31st July 2015):<input name="ageyear" type="text" id="ageyear" size="2" readonly>years<input name="agemonth" type="text" id="agemonth" size="2" readonly>months and<input name="ageday" type="text" id="ageday" size="2" readonly>days
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">8. Email:<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><input name="afc_email" type="text" id="afc_email" value="<?php echo "$rs1->email" ?>" readonly />
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">9. Category :<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="category" id="category" onclick="hideDD()">
<option value="">Select</option>
<option value="General">General</option>
<option value="OBC">OBC</option>
<option value="SC">SC</option>
<option value="ST">ST</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">10 : You are a citizen of India by<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="citizen" id="citizen">
<option value="">Select</option>
<option value="Birth">Birth</option>
<option value="Domicile">Domicile</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">11 : Religion<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="religion" id="religion">
<option value="">Select</option>
<option value="Hindu">Hindu</option>
<option value="Muslims">Muslims</option>
<option value="Christians">Christians</option>
<option value="Sikhs">Sikhs</option>
<option value="Buddhists">Buddhists</option>
<option value="Zoroastrians">Zoroastrians</option>
<option value="Others">Others</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">12 : Whether Ex-servicemen<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="exsrv" id="exsrv" onclick="enb_dis(); hideDD()">
<option value="">Select</option>
<option value="Yes">Yes</option>
<option value="No">No</option>
</select>
<table name="table_exserve" id="table_exserve" border="1">
<tr>
<td>Have you already secured employment in civil side under central Govt. in Group C and D in regular basis after availing this benefit</td>
<td bgcolor="#FFF3D5"><select name="exsrv_benefit" id="exsrv_benefit">
<option value="">Select</option>
<option value="Yes">Yes</option>
<option value="No">No</option>
</select> </td>
</tr>
<tr>
<td>Date of appoinment in arm force</td>
<td bgcolor="#FFF3D5"><input name="exsrv_from" type="text" id="exsrv_from" maxlength="10"/><span class="style2">(yyyy/mm/dd)</span></td>
</tr>
<tr>
<td>Date of discharge / due date of discharge from arm force</td>
<td bgcolor="#FFF3D5"><input name="exsrv_to" type="text" id="exsrv_to" maxlength="10" onchange="milical()"/><span class="style2">(yyyy/mm/dd)</span></td>
</tr>
<tr>
<td>Length of actual Military services</td>
<td bgcolor="#FFF3D5"><input name="miliyear" type="text" id="miliyear" size="2" readonly>years<input name="milimonth" type="text" id="milimonth" size="2" readonly>months and<input name="miliday" type="text" id="miliday" size="2" readonly>days</td>
</tr>
</table>
</tr>
<tr>
<td bgcolor="#FFF3D5">13 : Whether person with disability(PWD) / Physically handicapped (PH)<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><select name="PWDPH" id="PWDPH" onclick="enb_dis(); hideDD()">
<option value="">Select</option>
<option value="Yes">Yes</option>
<option value="No">No</option>
</select>
<table name="table_PWDPH" id="table_PWDPH" border="1">
<tr>
<td>Nature of disability</td>
<td bgcolor="#FFF3D5"><select name="PWDPH_nature" id="PWDPH_nature">
<option value="">Select</option>
<option value="B">B</option>
<option value="LV">LV</option>
<option value="PD">PD</option>
<option value="D">D</option>
<option value="OA">OA</option>
<option value="OL">OL</option>
<option value="BL">BL</option>
</select> </td>
</tr>
<tr>
<td>Degree of disability</td>
<td bgcolor="#FFF3D5"><select name="PWDPH_degree" id="PWDPH_degree">
<option value="">Select</option>
<option value="40">40</option>
<option value="41">41</option>
<option value="42">42</option>
<option value="43">43</option>
<option value="44">44</option>
<option value="45">45</option>
<option value="46">46</option>
<option value="47">47</option>
<option value="48">48</option>
<option value="49">49</option>
<option value="50">50</option>
<option value="51">51</option>
<option value="52">52</option>
<option value="53">53</option>
<option value="54">54</option>
<option value="55">55</option>
<option value="56">56</option>
<option value="57">57</option>
<option value="58">58</option>
<option value="59">59</option>
<option value="60">60</option>
<option value="61">61</option>
<option value="62">62</option>
<option value="63">63</option>
<option value="64">64</option>
<option value="65">65</option>
<option value="66">66</option>
<option value="67">67</option>
<option value="68">68</option>
<option value="69">69</option>
<option value="70">70</option>
<option value="71">71</option>
<option value="72">72</option>
<option value="73">73</option>
<option value="74">74</option>
<option value="75">75</option>
<option value="76">76</option>
<option value="77">77</option>
<option value="78">78</option>
<option value="79">79</option>
<option value="80">80</option>
<option value="81">81</option>
<option value="82">82</option>
<option value="83">83</option>
<option value="84">84</option>
<option value="85">85</option>
<option value="86">86</option>
<option value="87">87</option>
<option value="88">88</option>
<option value="89">89</option>
<option value="90">90</option>
<option value="91">91</option>
<option value="92">92</option>
<option value="93">93</option>
<option value="94">94</option>
<option value="95">95</option>
<option value="96">96</option>
<option value="97">97</option>
<option value="98">98</option>
<option value="99">99</option>
<option value="100">100</option>
</select>
</td>
</tr>
</table>
</tr>
Every time I did modification, the last jQuery item worked fine, rests did not work. For example in this code only PWDPD element worked fine, category and gender did not worked fine.

I've made several changes in your code like <table> tag was not not implemented properly and without that you had <tr> at beginning. So after editing all those things your code goes as below:
I've kept an alert inside your function which shows up on each element you have called that function and I've change onclick to onchange for your select element.
function hideDD() {
var gndr = $('#gender').val();
alert(gndr);
if(gndr=="Female"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
var cat = $('#category').val();
if(cat=="SC" || cat=="ST"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
var xsrv = $('#exsrv').val();
if(xsrv=="Yes"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
var PD = $('#PWDPH').val();
if(PD=="Yes"){
$("#table_dd").hide();
$("#dd_bank").val('');
$("#dd_number").val('');
$("#dd_date").val('');
}
else
{
$("#table_dd").show();
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
<tr>
<td bgcolor="#FFF3D5">5. Gender :<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select id="gender" onchange="hideDD()">
<option value="Select">Select</option>
<option value="Male">Male</option>
<option value="Female">Female</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">6. Marital Status :<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select name="maritalstatus" id="maritalstatus">
<option value="">Select</option>
<option value="Married">Married</option>
<option value="Unmarried">Unmarried</option>
<option value="Widow">Widow</option>
<option value="Divorced">Divorced</option>
<option value="Judicially separated and not married">Judicially separated and not married</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">7. Date of Birth: <span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><input name="dateofbirth" type="text" id="dateofbirth" value="<?php echo "$rs1->dateofbirth" ?>" readonly />
<span class="style2">(yyyy/mm/dd)</span>
Your age(as on 31st July 2015):<input name="ageyear" type="text" id="ageyear" size="2" readonly>years<input name="agemonth" type="text" id="agemonth" size="2" readonly>months and<input name="ageday" type="text" id="ageday" size="2" readonly>days
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">8. Email:<span class="style2">*</span></td>
<td bgcolor="#FFF3D5"><input name="afc_email" type="text" id="afc_email" value="<?php echo "$rs1->email" ?>" readonly /></td>
</tr>
<tr>
<td bgcolor="#FFF3D5">9. Category :<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select name="category" id="category" onchange="hideDD()">
<option value="">Select</option>
<option value="General">General</option>
<option value="OBC">OBC</option>
<option value="SC">SC</option>
<option value="ST">ST</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">10 : You are a citizen of India by<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select name="citizen" id="citizen">
<option value="">Select</option>
<option value="Birth">Birth</option>
<option value="Domicile">Domicile</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">11 : Religion<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select name="religion" id="religion">
<option value="">Select</option>
<option value="Hindu">Hindu</option>
<option value="Muslims">Muslims</option>
<option value="Christians">Christians</option>
<option value="Sikhs">Sikhs</option>
<option value="Buddhists">Buddhists</option>
<option value="Zoroastrians">Zoroastrians</option>
<option value="Others">Others</option>
</select>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">12 : Whether Ex-servicemen<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select name="exsrv" id="exsrv" onchange="hideDD()">
<option value="">Select</option>
<option value="Yes">Yes</option>
<option value="No">No</option>
</select>
<table name="table_exserve" id="table_exserve" border="1">
<tr>
<td>Have you already secured employment in civil side under central Govt. in Group C and D in regular basis after availing this benefit</td>
<td bgcolor="#FFF3D5">
<select name="exsrv_benefit" id="exsrv_benefit">
<option value="">Select</option>
<option value="Yes">Yes</option>
<option value="No">No</option>
</select>
</td>
</tr>
<tr>
<td>Date of appoinment in arm force</td>
<td bgcolor="#FFF3D5"><input name="exsrv_from" type="text" id="exsrv_from" maxlength="10"/><span class="style2">(yyyy/mm/dd)</span></td>
</tr>
<tr>
<td>Date of discharge / due date of discharge from arm force</td>
<td bgcolor="#FFF3D5"><input name="exsrv_to" type="text" id="exsrv_to" maxlength="10" onchange="milical()"/><span class="style2">(yyyy/mm/dd)</span></td>
</tr>
<tr>
<td>Length of actual Military services</td>
<td bgcolor="#FFF3D5"><input name="miliyear" type="text" id="miliyear" size="2" readonly>years<input name="milimonth" type="text" id="milimonth" size="2" readonly>months and<input name="miliday" type="text" id="miliday" size="2" readonly>days</td>
</tr>
</table>
</td>
</tr>
<tr>
<td bgcolor="#FFF3D5">13 : Whether person with disability(PWD) / Physically handicapped (PH)<span class="style2">*</span></td>
<td bgcolor="#FFF3D5">
<select name="PWDPH" id="PWDPH" onchange="hideDD();">
<option value="">Select</option>
<option value="Yes">Yes</option>
<option value="No">No</option>
</select>
<table name="table_PWDPH" id="table_PWDPH" border="1">
<tr>
<td>Nature of disability</td>
<td bgcolor="#FFF3D5">
<select name="PWDPH_nature" id="PWDPH_nature">
<option value="">Select</option>
<option value="B">B</option>
<option value="LV">LV</option>
<option value="PD">PD</option>
<option value="D">D</option>
<option value="OA">OA</option>
<option value="OL">OL</option>
<option value="BL">BL</option>
</select>
</td>
</tr>
<tr>
<td>Degree of disability</td>
<td bgcolor="#FFF3D5">
<select name="PWDPH_degree" id="PWDPH_degree">
<option value="">Select</option>
<option value="40">40</option>
<option value="41">41</option>
<option value="42">42</option>
<option value="43">43</option>
<option value="44">44</option>
<option value="45">45</option>
<option value="46">46</option>
<option value="47">47</option>
<option value="48">48</option>
<option value="49">49</option>
<option value="50">50</option>
<option value="51">51</option>
<option value="52">52</option>
<option value="53">53</option>
<option value="54">54</option>
<option value="55">55</option>
<option value="56">56</option>
<option value="57">57</option>
<option value="58">58</option>
<option value="59">59</option>
<option value="60">60</option>
<option value="61">61</option>
<option value="62">62</option>
<option value="63">63</option>
<option value="64">64</option>
<option value="65">65</option>
<option value="66">66</option>
<option value="67">67</option>
<option value="68">68</option>
<option value="69">69</option>
<option value="70">70</option>
<option value="71">71</option>
<option value="72">72</option>
<option value="73">73</option>
<option value="74">74</option>
<option value="75">75</option>
<option value="76">76</option>
<option value="77">77</option>
<option value="78">78</option>
<option value="79">79</option>
<option value="80">80</option>
<option value="81">81</option>
<option value="82">82</option>
<option value="83">83</option>
<option value="84">84</option>
<option value="85">85</option>
<option value="86">86</option>
<option value="87">87</option>
<option value="88">88</option>
<option value="89">89</option>
<option value="90">90</option>
<option value="91">91</option>
<option value="92">92</option>
<option value="93">93</option>
<option value="94">94</option>
<option value="95">95</option>
<option value="96">96</option>
<option value="97">97</option>
<option value="98">98</option>
<option value="99">99</option>
<option value="100">100</option>
</select>
</td>
</tr>
</table>
</td>
</tr>
</table>

try place you code inside:
$(document).ready(function(){
YOUR CODE HERE
});

Stop URL parameters being added on submit of form

Okay, so this may be a stupid question, but I'm attempting to write a simple JavaScript app-thing (please excuse my terminology, I'm new to this) which includes a form, except I'm doing it using only HTML and JS (and CSS), so I'm accessing the values in the form by using document.getElementById.
The thing is the Javascript function is supposed to display something, based on the form values (it's basically a GPA calculator), but the things to display simply flash on the screen, and then disappear when I run the HTML file as is, and don't show up at all when I run it through my actual domain. I feel like the reason for this is that after you submit the form, a bunch of URL parameters get tacked on, thus refreshing the HTML, and deleting the newly added innerHTML.
Here's the code for my form:
<form id="calculator" name="calculator">
<table>
<thead>
<tr>
<td>Class Number</td>
<td>Grade</td>
<td>AP/Non-AP</td>
<td>GPA</td>
</tr>
</thead>
<tbody>
<tr>
<td class="classnumber">Class 1</td>
<td>
<select id="class1GPA" name="class1GPA">
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class1AP" name="class1AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class1disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 2</td>
<td>
<select id="class2GPA" name="class2GPA">
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class2AP" name="class2AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class2disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 3</td>
<td>
<select id="class3GPA" name="class3GPA">
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class3AP" name="class3AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class3disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 4</td>
<td>
<select id="class4GPA" name="class4GPA">
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class4AP" name="class4AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class4disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 5</td>
<td>
<select id="class5GPA" name="class5GPA">
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class5AP" name="class5AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class5disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 6</td>
<td>
<select id="class6GPA" name="class6GPA">
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class6AP" name="class6AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class6disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 7</td>
<td>
<select id="class7GPA" name="class7GPA">
<option value="none">N/A</option>
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class7AP" name="class7AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class7disp">
</td>
</tr>
<tr>
<td class="classnumber">Class 8</td>
<td>
<select id="class8GPA" name="class8GPA">
<option value="none">N/A</option>
<option value=4.4 selected>A+</option>
<option value=4.0>A</option>
<option value=3.7>A-</option>
<option value=3.4>B+</option>
<option value=3.0>B</option>
<option value=2.7>B-</option>
<option value=2.4>C+</option>
<option value=2.0>C</option>
<option value=1.7>C-</option>
<option value=1.4>D+</option>
<option value=1.0>D</option>
<option value=0.7>D-</option>
<option value=0>F</option>
</select>
</td>
<td>
<select id="class8AP" name="class8AP">
<option value=False selected>Regular Class</option>
<option value=True>AP Class</option>
</select>
</td>
<td id="class8disp">
</td>
</tr>
</br>
</tbody>
</table>
<input onClick="showGPA()" id="submit" type="submit" value="Calculate!"/>
</form>
And the Javascript that is supposed to process it (it doesn't actually display an average yet, but that's less important than figuring out why it just flashes/doesn't display):
function showGPA() {
var grades = {};
grades.classesNumber = 6
if (document.getElementById('class1AP').value === "True") {
grades.class1 = parseFloat(document.getElementById('class1GPA').value) + 0.5;
} else {
grades.class1 = parseFloat(document.getElementById('class1GPA').value);
}
document.getElementById('class1disp').innerHTML = grades.class1.toFixed(1);
if (document.getElementById('class2AP').value === "True") {
grades.class2 = parseFloat(document.getElementById('class2GPA').value) + 0.5;
} else {
grades.class2 = parseFloat(document.getElementById('class2GPA').value);
}
document.getElementById('class2disp').innerHTML = grades.class2.toFixed(1);
if (document.getElementById('class3AP').value === "True") {
grades.class3 = parseFloat(document.getElementById('class3GPA').value) + 0.5;
} else {
grades.class3 = parseFloat(document.getElementById('class3GPA').value);
}
document.getElementById('class3disp').innerHTML = grades.class3.toFixed(1);
if (document.getElementById('class4AP').value === "True") {
grades.class4 = parseFloat(document.getElementById('class4GPA').value) + 0.5;
} else {
grades.class4 = parseFloat(document.getElementById('class4GPA').value);
}
document.getElementById('class4disp').innerHTML = grades.class4.toFixed(1);
if (document.getElementById('class5AP').value === "True") {
grades.class5 = parseFloat(document.getElementById('class5GPA').value) + 0.5;
} else {
grades.class5 = parseFloat(document.getElementById('class5GPA').value);
}
document.getElementById('class5disp').innerHTML = grades.class5.toFixed(1);
if (document.getElementById('class6AP').value === "True") {
grades.class6 = parseFloat(document.getElementById('class6GPA').value) + 0.5;
} else {
grades.class6 = parseFloat(document.getElementById('class6GPA').value);
}
document.getElementById('class6disp').innerHTML = grades.class6.toFixed(1);
if (document.getElementById('class7GPA').value !== "none") {
if (document.getElementById('class7AP').value === "True") {
grades.class7 = parseFloat(document.getElementById('class7GPA').value) + 0.5;
} else {
grades.class7 = parseFloat(document.getElementById('class7GPA').value);
}
document.getElementById('class7disp').innerHTML = grades.class7.toFixed(1);
grades.classesNumber++;
} else {
grades.class7 = 0;
}
if (document.getElementById('class8GPA').value !== "none") {
if (document.getElementById('class8AP').value === "True") {
grades.class8 = parseFloat(document.getElementById('class8GPA').value) + 0.5;
} else {
grades.class8 = parseFloat(document.getElementById('class8GPA').value);
}
document.getElementById('class8disp').innerHTML = grades.class8.toFixed(1);
grades.classesNumber++;
} else {
grades.class8 = 0;
}
}
How is it possible for me to stop 16 different URL parameters from being added on when the form submits?
Now my guess as to why it doesn't work may be completely wrong, as I said, I'm new to this. (While trying to make this work, I noticed that one of the problems was that I spelt .innerHTML as .innnerHTML)
But if someone could help me make this work, preferably without learning PHP or something, that would be great. Thanks!

When you submit a form, it will do an HTTP post to the action you specify. If you're looking to run some javascript on your form here, and stop it from posting, add 'return false' on your submit.
http://jsbin.com/icobam/2/edit
<form id="calculator" name="calculator" onsubmit="return false;">

<form id="calculator" name="calculator" onsubmit='showGPA();' method="post">
Inserting method="post" will stop the form from adding parameters in the URL.

Remove the onclick statement from the submit button:
<input onClick="showGPA()" id="submit"
to
<input id="submit"
Change the form to:
<form id="calculator" name="calculator" onsubmit='showGPA(); return false;'>
Note: if there are any javascript errors within the showGPA function then the form will be submitted and cause a page refresh. The only way to prevent this is to ensure that there are no javascript errors.

Keep values pushed into array using javascript

I have created some code in JavaScript that allows the user to add values to a dropdown menu and three arrays which the dropdown menu pulls and displays values from. I was wondering if there is a way to create a cookie or something that will keep the values that a user adds. Below is my code an here is the link to the working JSfiddle.
<html>
<head>
<title>Selected Index Design</title>
<script >
var arr1 = ["",0,6,0,15,4,0,1,0,0,17];
var arr2 = ["",0,5,19,3,26,3,25,0,0,24];
var arr3= ["",0,15,0,9,0,5,0,0,0,7];
function fill() {
var si = document.getElementById('dd').selectedIndex;
if (si !==0)
{
var a = arr1[si];
var b= arr2[si];
var c= arr3[si];
var x = document.getElementById("factor").value;
var d= a*x;
var e= b*x;
var f=c*x;
var g = d*4 + e*4 + f*9;
document.getElementById("val1").innerHTML=d;
document.getElementById('val2').innerHTML=e;
document.getElementById('val3').innerHTML=f;
document.getElementById('val4').innerHTML=g;
}
}
function addoption(){
var mySelect = document.getElementById('dd'),
newOption = document.createElement('option');
newOption.value = document.getElementById('addopt').value;
if (typeof newOption.innerText === 'undefined')
{
newOption.textContent = document.getElementById('addopt').value;
}
else
{
newOption.innerText = document.getElementById('addopt').value;
}
mySelect.appendChild(newOption);
var newone= document.getElementById('addone').value;
var newtwo= document.getElementById('addtwo').value;
var newthree= document.getElementById('addthree').value;
arr1.push(newone);
arr2.push(newtwo);
arr3.push(newthree);
}
</script>
</head>
<body>
<table id="table1">
<tr>
<th>dd</th>
<th>factor</th>
<th>v1</th>
<th>v2</th>
<th>v3</th>
<th>v4</th>
</tr>
<tr class="odd">
<td>
<form name = "dd">
<select name = "dd" id="dd" onchange = "fill()">
<option > a </option>
<option > b </option>
<option > c </option>
<option > d </option>
<option > e </option>
<option > f </option>
<option > g </option>
<option > h </option>
<option > i </option>
<option > j </option>
<option > k </option>
</select>
</form>
</td>
<td id="fac">
<form name="factor">
<select id="factor" onChange="fill();">
<option value=""></option>
<option value=1>1</option>
<option value=2>2</option>
<option value=3>3</option>
<option value=4>4</option>
<option value=5>5</option>
<option value=6>6</option>
<option value=7>7</option>
<option value=8>8</option>
<option value=9>9</option>
</select>
</form>
</td>
<td id="val1"></td>
<td id="val2"></td>
<td id="val3"></td>
<td id="val4"></td>
</tr>
<tr class="even">
<td></td>
<td></td>
<td ></td>
<td ></td>
<td ></td>
<td ></td>
</tr>
</table>
<br><br>
<h3>Insert New data</h3>
<b>option<b>
<input type='text' value='' id='addopt'><br><br>
<b>array one</b>
<input type='text' value='' id='addone'><br><br>
<b>array 2</b>
<input type='text' value="" id='addtwo'><br><br>
<b>array 3</b>
<input type='text' value='' id='addthree'><br><br>
<button id="button" onclick="addoption()">add</button>
<div id='result'></div>
</body>
</html>

You might be interested by something like HTML5 Offline Storage: http://www.html5rocks.com/en/tutorials/offline/storage/

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