We Keep Coding

Why is my exception handling not catching?

This is my html code that I am trying to create the exception handling for. I am trying to create the exceptions for the first form in this code.
<form id="survey" name="survey" method="post">
<div id="errorText"></div>
<fieldset class="labelfloatleft" id="contactinfo"><legend>Your Thoughts</legend>
<label for="firstname">First Name</label>
<input type="text" name="firstname" id="firstname" />
<label for="lastname">Last Name</label>
<input type="text" name="lastname" id="lastname" />
<label for="emailaddress">Email Address</label>
<input type="email" name="emailaddress" id="emailaddress"
size="30" placeholder="foryou#yahoo.com" />
</fieldset>
<fieldset><legend>Best Movie</legend>
<input type="radio" name="movie" id="horror" value="horror" checked="checked"/>
<label for="horror">The Horror</label>
<input type="radio" name="movie" id="badabing" value="badabing" />
<label for="badabing">Bada-Bing Bada-Boom</label>
<input type="radio" name="movie" id="roll" value="roll" />
<label for="roll">Roll or Die</label>
</fieldset>
<fieldset><legend>Comments</legend>
<label for="message">Your Opinion</label>
<textarea name="message" id="message" rows="7" cols="30"></textarea>
</fieldset>
<input type="submit" value="Send" class="button" id="submitBtn"/>
<input type="reset" value="Cancel" class="button" />
</form>
<h2>Welcome To Our World</h2>
<p class="very">We are a small time movie theater looking to help inspire
people who come to our theater. Our theaters come with
fresh food, cold and hot drinks, souvenirs and comfortable
seats to help make your experience worth while.
</p>
<h2>Most Popular</h2>
<ul>
<li>The Horror</li>
<li>Bada-Bing Bada-Boom</li>
<li>Roll or Die</li>
</ul>
<h2>Prices</h2>
<table title="prices">
<tr>
<th>Ticket</th>
<th>Price</th>
<th>Thursday Deal</th>
</tr>
<tr>
<td>Adult</td>
<td>$10.00</td>
<td rowspan="3">Half-Off</td>
</tr>
<tr>
<td>Child</td>
<td>$6.00</td>
</tr>
<tr>
<td>Senior</td>
<td>$8.00</td>
</table>
<form id="price" name="price" method="post">
<fieldset><legend>Ticket Quantity</legend>
<label for="adultinput">Adult 15-60
<input type="text" id="adultinput" value="1" size="2"/>
</label>
<label for="childinput">Child 1-14
<input type="text" id="childinput" value="0" size="2"/>
</label>
<label for="seniorinput">Senior 50 and up
<input type="text" id="seniorinput" value="0" size="2"/>
</label>
</fieldset>
<input type="submit" value="Calculate" id="calculate" class="button" />
<input type="reset" value="Cancel" class="button" />
</form>
This is my exception handling code that I am trying to get working. However, no matter how much I modify it, it never shows correctly. I have ran it in Chrome and have tried using a debugger to help however I am still unable to show the exceptions when I click the submit button.
"use strict";
var fnameComplete = true;
var lnameComplete = true;
var emailComplete = true;
var fname = document.getElementById("firstname").value;
var lname = document.getElementById("lastname").value;
var email = document.getElementById("emailaddress").value;
var errorDiv = document.getElementById("errorText");
function verifyFname() {
var validity = true;
var messageText = "";
var errorDiv = document.getElementById("errorText");
try {
if(!(isNaN(fname.value)) || (fname.value === "")){
fname.style.background = "rgb(255,233,233)";
throw "Please enter your first name.";
}
}
catch(message) {
validity = false;
messageText = message;
}
finally{
numErrorDiv.style.display = "block";
fnameComplete = validity;
errorDiv.innerHTML = messageText;
}
}
function verifyLname() {
var validity = true;
var messageText = "";
var errorDiv = document.getElementById("errorText");
try {
if(!(isNaN(lname.value)) || (lname.value === "")){
lname.style.background = "rgb(255,233,233)";
throw "Please enter your first name.";
}
}
catch(message) {
validity = false;
messageText = message;
}
finally{
errorDiv.style.display = "block";
lnameComplete = validity;
errorDiv.innerHTML = messageText;
}
}
function verifyEmail() {
var validity = true;
var messageText = "";
var errorDiv = document.getElementById("errorText");
try {
if(email === "") {
email.style.background = "rgb(255,233,233)";
throw "Please enter your email.";
}
}
catch(message) {
validity = false;
messageText = message;
}
finally{
numErrorDiv.style.display = "block";
emailComplete = validity;
errorDiv.innerHTML = messageText;
}
}
function validateForm(e) {
if (e.preventDefault) {
e.preventDefault(); //prevent form from submitting
} else {
e.returnValue = false; //prevent form from submitting in IE8
}
formValidity = true; //reset value for revalidation
verifyEmail();
verifyFname();
verifyLname();
if(formValidity === true) {
document.getElementsByTagName("form")[0].submit();
}
}
function createEventListeners() {
var form = document.getElementsByTagName("form")[0];
if (form.addEventListener){
form.addEventListener("submit", validateForm, false);
} else if(form.attachEvent) {
form.attachEvent("onsubmit", validateForm);
}
}
if (window.addEventListener) {
window.addEventListener("load", createEventListeners, false);
} else if(window.attachEvent) {
window.attachEvent("onload", createEventListeners);
}

It looks like you try to access a non existing field.
Here you already get the values of the fields
var fname = document.getElementById("firstname").value;
var lname = document.getElementById("lastname").value;
var email = document.getElementById("emailaddress").value;
And in your comparisons you try to access a value field again. But you already have the plain value
if(!(isNaN(lname.value)) || (lname.value === "")){
}
Do it this way instead
if(!(isNaN(lname)) || (lname === "")){
}

Form submitting without refresh not working

I am trying to submit a form without doing a hard refresh but my page is refreshing. I tried putting action=“javascript:void(0);" in the form tag but that didn't work. I also cannot use jquery.
Work Flow that causes error:
Submitting a form that is supposed to send some information to a php file.
Page gets directed to another page that doesn't exist.
function toggle_visibility(id){
var e = document.getElementById(id);
if(e.style.visibility == 'hidden'){
e.style.visibility = 'visible';
}
else{
e.style.visibility = 'hidden';
}
}
function createAjaxRequestObject() {
var httpRequest;
if (window.XMLHttpRequest) { // Mozilla, Safari, ...
httpRequest = new XMLHttpRequest();
if (httpRequest.overrideMimeType) {
httpRequest.overrideMimeType('text/xml');
}
}
else if (window.ActiveXObject) { // IE
try {
httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {}
}
}
if (!httpRequest) {
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
// Create the object
return httpRequest;
}
function sendTicket() {
var firstName = document.getElementById("firstName").value;
var lastName = document.getElementById("lastName").value;
var email = document.getElementById("email").value;
var subject = document.getElementById("subject").value;
var msg = document.getElementById("msg").value;
var encFirst = encodeURIComponent(firstName);
var encLast = encodeURIComponent(lastName);
var encEmail = encodeURIComponent(email);
var encsubject = encodeURIComponent(subject);
var encmsg = encodeURIComponent(msg);
var info = "firstName="+encFirst+"&lastName="+encLast+"&email="+encEmail+"&subject="+encsubject+"&msg="+encmsg;
var http3 = createAjaxRequestObject();
if (http3.readyState == 4) {
if (http3.status == 200){
var result = JSON.parse(http3.responseText);
console.log(result);
}
}
http3.open("POST", "send_mail.php", true);
http3.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http3.send(info);
}
</script>
Welcome!
View My Tickets
Submit Ticket
Change my Password
Full Name
Email
Subject
Your Message *

You should change the type of you input from submit to button so the sendTicket() will be triggered, else the form will be submited before reached your sendTicket() function so it should be :
<input type="button" value="Submit" onclick="sendTicket();" />
Instead of :
<input type="submit" value="Submit" onclick="sendTicket();" />
Hope this helps.
function sendTicket() {
var firstName = document.getElementById("firstName").value;
var lastName = document.getElementById("lastName").value;
var email = document.getElementById("email").value;
var subject = document.getElementById("subject").value;
var msg = document.getElementById("msg").value;
var encFirst = encodeURIComponent(firstName);
var encLast = encodeURIComponent(lastName);
var encEmail = encodeURIComponent(email);
var encsubject = encodeURIComponent(subject);
var encmsg = encodeURIComponent(msg);
var info = "firstName="+encFirst+"&lastName="+encLast+"&email="+encEmail+"&subject="+encsubject+"&msg="+encmsg;
console.log(info);
}
<h1>Welcome! </h1>
<div id="buttons">
<button class="myButton" onclick="showTickets(); toggle_visibility('table');">View My Tickets</button>
<button class="myButton" onclick="toggle_visibility('Submit');">Submit Ticket</button>
<button class="myButton" onclick="toggle_visibility('changePassword');">Change my Password</button>
</div>
<div id = "table"> </div>
<div id = "Submit">
<form id = "emailForm" action="javascript:void(0);">
<ul class="form-style-1">
<li><label>Full Name <span class="required">*</span></label><input type="text" name="firstName" class="field-divided" placeholder="First" id="firstName" /> <input type="text" name="field2" class="field-divided" placeholder="lastName" id = "lastName" /></li>
<li>
<label>Email <span class="required">*</span></label>
<input type="email" name="email" class="field-long" id= "email" />
</li>
<li>
<label>Subject</label>
<input type="text" name="subject" class="field-divided" placeholder="Subject" id="subject" />
</li>
<li>
<label>Your Message <span class="required">*</span></label>
<textarea name="msg" id="msg" class="field-long field-textarea"></textarea>
</li>
<li>
<input type="button" value="Submit" onclick="sendTicket();" />
</li>
</ul>
</form>
</div>
<br><br><br><br><br><br><br><br>

Creating a dynamic form with input buttons

I've tried many different methods, and even tried searching on SO. No answer was what I was looking for.
What I want is to have two input buttons that do some things in pure javascript.
Button one: Have it say "Add" when the page loads. When clicked, the value changes to "Cancel." Also, when it's clicked, have it display a form with three fields. When it's clicked again, have the form disappear. One named 'name', the second named 'location', the third named 'type'. I want the user to be able to submit these three things and have them be stored in the code.
Button two: Take the user input from the form and each time the user clicks, it displays all three information values, but have the button act as random generator. Let's say the code has 5 separate entries, I want them to be randomly selected and displayed when the button is clicked.
Like I said, I tried to make this work, but couldn't quite get over the top of where I wanted to go with it. If you want to see my original code, just ask, but I doubt it will be of any assistance.
Thanks in advance.
EDIT: Added the code.
function GetValue() {
var myarray = [];
var random = myarray[Math.floor(Math.random() * myarray.length)];
document.getElementById("message").innerHTML = random;
}
var testObject = {
'name': BWW,
'location': "Sesame Street",
'type': Bar
};
localStorage.setItem('testObject', JSON.stringify(testObject));
var retrievedObject = localStorage.getItem('testObject');
function change() {
var elem = document.getElementById("btnAdd1");
if (elem.value == "Add Spot") {
elem.value = "Cancel";
} else elem.value = "Add Spot";
}
window.onload = function() {
var button = document.getElementById('btnAdd1');
button.onclick = function show() {
var div = document.getElementById('order');
if (div.style.display !== 'none') {
div.style.display = 'none';
} else {
div.style.display = 'block';
}
};
};
<section>
<input type="button" id="btnChoose" value="Random Spot" onclick="GetValue();" />
<p id="message"></p>
<input type="button" id="btnAdd1" value="Add Spot" onclick="change();" />
<div class="form"></div>
<form id="order" style="display:none;">
<input type="text" name="name" placeholder="Name of Resturant" required="required" autocomplete="on" />
<input type="text" name="type" placeholder="Type of Food" required="required" autocomplete="off" />
<input type="text" name="location" placeholder="Location" required="required" autocomplete="off" />
<input type="submit" value="Add Spot" />
</form>
</div>
</section>
The randomizer works, and so does the appear/hide form. Only thing is storing the input and switching the input value.

Here's one way to do this. Each form submission is stored as an object in an array. The random button randomly selects an item from the array and displays it below.
HTML:
<section>
<input type="button" id="btnChoose" value="Random Spot" />
<p id="message"></p>
<input type="button" id="btnAdd1" value="Add Spot" />
<div class="form">
<form id="order" style="display:none;">
<input id="orderName" type="text" name="name" placeholder="Name of Resturant" required="required" autocomplete="on" />
<input id="orderType" type="text" name="type" placeholder="Type of Food" required="required" autocomplete="off" />
<input id="orderLocation" type="text" name="location" placeholder="Location" required="required" autocomplete="off" />
<input type="submit" value="Add Spot" />
</form>
</div>
</section>
<div id="randomName"></div>
<div id="randomLocation"></div>
<div id="randomType"></div>
JS:
var formData = [];
var formSubmission = function(name, location, type) {
this.name = name;
this.location = location;
this.type = type;
}
var spotName = document.getElementById("orderName"),
spotLocation = document.getElementById("orderLocation"),
spotType = document.getElementById("orderType");
var addClick = function() {
if (this.value === 'Add Spot') {
this.value = "Cancel";
document.getElementById('order').style.display = 'block';
}
else {
this.value = 'Add Spot';
document.getElementById('order').style.display = 'none';
}
}
document.getElementById("btnAdd1").onclick = addClick;
document.getElementById('order').onsubmit = function(e) {
e.preventDefault();
var submission = new formSubmission(spotName.value, spotLocation.value, spotType.value);
formData.push(submission);
submission = '';
document.getElementById('btnAdd1').value = 'Add Spot';
document.getElementById('order').style.display = 'none';
this.reset();
}
var randomValue;
document.getElementById('btnChoose').onclick = function() {
randomValue = formData[Math.floor(Math.random()*formData.length)];
document.getElementById('randomName').innerHTML = randomValue.name;
document.getElementById('randomLocation').innerHTML = randomValue.location;
document.getElementById('randomType').innerHTML = randomValue.type;
}

I was working on something since you first posted, and here is my take on it:
HTML:
<section>
<p id="message">
<div id="name"></div>
<div id="location"></div>
<div id="type"></div>
</p>
<input type="button" id="btnAdd" value="Add" onclick="doAdd(this);" />
<input type="button" id="btnShow" value="Show" onclick="doShow(this);" />
<div class="form">
<script id="myRowTemplate" type="text/template">
<input type="text" name="name" placeholder="Name of Resturant" required="required" autocomplete="on" onchange="onChanged(this, {{i}})" />
<input type="text" name="type" placeholder="Type of Food" required="required" autocomplete="off" onchange="onChanged(this, {{i}})" />
<input type="text" name="location" placeholder="Location" required="required" autocomplete="off" onchange="onChanged(this, {{i}})" />
</script>
<form id="order" style="display:none;">
<div id="formItems">
</div>
<input type="button" value="Add Spot" onclick="addSpot()" />
</form>
</div>
</section>
JS:
function GetValue() {
if (enteredItems.length) {
var entry = enteredItems[Math.floor(Math.random() * enteredItems.length)];
document.getElementById("name").innerHTML = entry.name;
document.getElementById("location").innerHTML = entry.location;
document.getElementById("type").innerHTML = entry.type;
}
}
function doAdd(elem) {
switch (elem.value) {
case "Add":
document.getElementById('order').style.display = "";
elem.value = "Cancel";
break;
case "Cancel":
document.getElementById('order').style.display = "none";
elem.value = "Add";
break;
}
}
function doShow(elem) {
GetValue();
}
function addSpot(index) { // (note: here, index is only for loading for the first time)
if (index == undefined) index = enteredItems.length;
var newRowDiv = document.createElement("div");
newRowDiv.innerHTML = document.getElementById("myRowTemplate").innerHTML.replace(/{{i}}/g, index); // (this updates the template with the entry in the array it belongs)
if (enteredItems[index] == undefined)
enteredItems[index] = { name: "", location: "", type: "" }; // (create new entry)
else {debugger;
newRowDiv.children[0].value = enteredItems[index].name;
newRowDiv.children[1].value = enteredItems[index].location;
newRowDiv.children[2].value = enteredItems[index].type;
}
document.getElementById("formItems").appendChild(newRowDiv);
}
function onChanged(elem, index) {
enteredItems[index][elem.name] = elem.value;
localStorage.setItem('enteredItems', JSON.stringify(enteredItems)); // (save each time
}
// update the UI with any saved items
var enteredItems = [];
window.addEventListener("load", function() {
var retrievedObject = localStorage.getItem('enteredItems');
if (retrievedObject)
enteredItems = retrievedObject = JSON.parse(retrievedObject);
for (var i = 0; i < enteredItems.length; ++i)
addSpot(i);
});
https://jsfiddle.net/k1vp8dqn/
It took me a bit longer because I noticed you were trying to save the items, so I whipped up something that you can play with to suit your needs.

Using Buttons in JavaScript

How can you create a button so that whenever you click on it a question changes to its uppercase form, then when you click the button again it changes to its lowercase form. I believe I should create a function of some sort, just not sure how. Below is what I have tried so far:
function upper_lower() {
if (windows.document.f1.value=="lower") {
windows.document.value = "UPPER"
windows.document.question = windows.document.question.toUpperCase();
windows.document.queston.size="40"
} else {
windows.document.value = "lower"
windows.document.question = windows.document.question.toLowerCase()
windows.document.queston.size="30"
}
}
Question
<input type="text" name="question" value="Favorite food?" size="25">
readonly /input
<input type="button" name="f1" value="UPPER" onClick = "upper_lower">

Try this
Html:
Question <input type="text" name="question" id="question1" value="Favorite food?" size="25" readonly></input>
<input type="button" name="f1" id="button1" value="UPPER" onClick="upper_lower()"></input>
js:
var toggle = true;
function upper_lower(){
var question = document.getElementById('question1'),
button = document.getElementById('button1');
if(toggle){
question.value = question.value.toUpperCase();
button.value = 'LOWER';
toggle = false;
} else{
question.value = question.value.toLowerCase();
button.value = 'UPPER';
toggle = true;
}
}
Snippet below (indented weird for some reason)
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>Document</title>
</head>
<body>
Question <input type="text" name="question" id="question1" value="Favorite food?" size="25" readonly></input>
<input type="button" name="f1" id="button1" value="UPPER" onClick="upper_lower()"></input>
</body>
<script>
var toggle = true;
function upper_lower(){
var question = document.getElementById('question1'),
button = document.getElementById('button1');
if(toggle){
question.value = question.value.toUpperCase();
button.value = 'LOWER';
toggle = false;
} else{
question.value = question.value.toLowerCase();
button.value = 'UPPER';
toggle = true;
}
}
</script>
</html>

Try This Updated Code...
<script type="text/javascript">
var flag = 0;
function changecase() {
if (flag == 0) {
document.form1.instring.value = document.form1.instring.value.toUpperCase();
document.form1.Convert.value = 'To Lower'
flag = 1;
}
else
{
document.form1.instring.value = document.form1.instring.value.toLowerCase();
document.form1.Convert.value = 'To Upper'
flag = 0;
}
}
</script>
<form name="form1" method="post">
<input name="instring" type="text" value="this is the text string" size="30">
<input type="button" name="Convert" value="To Upper " onclick="changecase();">
</form>

Validation With Java Script and printing

I have a form in HTML and that if the fields are left blank, the Javascript will print inside the fields error. Please can some one give me a piece of code that will validate the form and then will print Error on top of the form if its left blank and not inside the fields of the form?
My Form:
<form id="contact" onsubmit="checkContactForm(); return false;" onreset="resetForm();">
<p>Fill in the form below to send me a message!</p>
<div id="errormessage"></div>
<p>
<label for=""> </label>
<input type="text" name="" id="" onfocus="" />
<p>
<label for="name">Name:</label>
<input type="text" name="name" id="name" onfocus="resetField(this);" />
</p>
<p>
<label for="email">E-mail address:</label>
<input type="text" name="email" id="email" onfocus="resetField(this);" />
</p>
<p>
<label for="message">Your Message:</label>
<textarea name="message" id="message" rows="5" cols="25" onfocus="resetField(this);"></textarea>
</p>
<p>
<button type="submit">Send Message</button>
<button type="reset">Reset Form</button>
</p>
My Javascript:
var requiredFields = ["name", "email", "message"];
function checkContactForm() {
var myForm = document.forms[0];
for (i in requiredFields) {
fieldName = requiredFields[i];
if (!myForm[fieldName].value || myForm[fieldName].value == "Error") {
myForm[fieldName].style.color = "#f66";
myForm[fieldName].value = "";
var emptyFields = true;
}
}
if (!emptyFields) { myForm.submit(); }
}
function resetField(myField) {
if (myField.value == "Error") {
myField.style.color = "#000";
myField.value = "";
}
}
function resetForm(myForm) {
var myForm = document.forms[0];
for (i in requiredFields) {
fieldName = requiredFields[i];
myForm[fieldName].style.color = "#000";
}
}

Since HTML5 there is a form-validation API (http://www.w3schools.com/js/js_form_validation.asp)
Here you can find a pretty good "tutorial": http://www.smashingmagazine.com/2009/07/07/web-form-validation-best-practices-and-tutorials/

If I've understand you want the error will be printed in the #errormessage div, right?
If so you can simply do something like this:
function addError(str){
document.getElementById("errormessage").innnerHTML = document.getElementById("errormessage").innerHTML + str + "<br>";
}
function checkContactForm() {
var myForm = document.forms[0];
for (i in requiredFields) {
fieldName = requiredFields[i];
if (!myForm[fieldName].value || myForm[fieldName].value == "Error") {
myForm[fieldName].style.color = "#f66";
myForm[fieldName].value = "";
var emptyFields = true;
addError(fiedlName+" is empty!");
}
}
if (!emptyFields) { myForm.submit(); }
}