How to get specific radio value from PHP - javascript

I'm not getting the right value from my radio buttons on my 'Thank You' page.
I want that after my user end the payment and he get redirected to the thank you page some values from the filled form to be posted there. And I have archive just that with this script on the form.php file:
<script type="text/javascript">
function CookieTheFormValues() {
var cookievalue = new Array();
var fid = document.getElementById(FormID);
for (i = 0; i < fid.length; i++)
{
var n = escape(fid[i].name);
if( ! n.length ) { continue; }
var v = escape(fid[i].value);
cookievalue.push( n + '=' + v );
}
var exp = "";
if(CookieDays > 0)
{
var now = new Date();
now.setTime( now.getTime() + parseInt(CookieDays * 24 * 60 * 60 * 1000) );
exp = '; expires=' + now.toGMTString();
}
document.cookie = CookieName + '=' + cookievalue.join("&") + '; path=/' + exp;
return true;
}
</script>
And than by putting this script on the thank you page :
<?php
$CookieName = "PersonalizationCookie";
$Personal = array();
foreach( explode("&",#$_COOKIE[$CookieName]) as $chunk )
{
list($name,$value) = explode("=",$chunk,2);
$Personal[$name] = htmlspecialchars($value);
}
?>
So far so good I get all right values from other inputs but from radios I get always the last in class name value? This mean for eg if I have this code:
<input type="radio" name="emotion" id="basi" value="Basic Pack" />
<input type="radio" name="emotion" id="deli" value="Deluxe Pack" />
<input type="radio" name="emotion" id="premi" value="Premium Pack"/>
And in the Thank you page I put this code for eg
Thank you for chosing <?php echo(#$Personal["emotion"]); ?>
I get always this Thank you for choosing Premium Pack even when i check the basic or deluxe radio why this?


Your loop:
for (i = 0; i < fid.length; i++)
{
var n = escape(fid[i].name);
if( ! n.length ) { continue; }
var v = escape(fid[i].value);
cookievalue.push( n + '=' + v );
}
will push all three of the radios into your cookie value. Each one will overwrite the previous, because they have the same name. So ultimately you're left with the value 'Premium Pack' mapped to the "emotion" name. You need to check if the radio is selected before you push the val, maybe something like:
for (i = 0; i < fid.length; i++)
{
var n = escape(fid[i].name);
if( ! n.length ) { continue; }
var v = escape(fid[i].value);
// Only push in the selected emotion radio button
if (n == "emotion") {
if (fid[i].checked == true) cookievalue.push( n + '=' + v );
}
else cookievalue.push( n + '=' + v );
}

Related

Change Javascript cookies redirection

i found this javascript that allow you to chose an option and once you click the go button. It will redirect you to another site. I have try modify this so i can use it with a button instead of a radio but it doesn't seem to work. Can any 1 help me out ??
Thank you very much.
here the code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title></title>
<script language="JavaScript" type="text/javascript">
//chose which page to go to
function Link() {
if (document.fred.r1[0].checked) {
window.top.location = 'http://kshowonline.com/list';
}
if (document.fred.r1[1].checked) {
window.top.location = 'https://www.google.com/';
}
if (document.fred.r1[2].checked) {
window.top.location = 'https://www.yahoo.com/';
}
if (document.fred.r1[3].checked) {
window.top.location = 'https://nodejs.org/';
}
}
//-->
</script>
</head>
<body onload="f19_GetFormCookie();Link();">
<form title="f19_Include" name="fred">
<INPUT type="radio" name="r1">Baseball
<INPUT type="radio" name="r1">Basketball
<INPUT type="radio" name="r1">Soccer
<INPUT type="radio" name="r1">Fencing
<INPUT type="button" value="GO" onclick="f19_SetFormCookie();Link();">
</form>
<script language="JavaScript" type="text/javascript">
<!--
// A Cookie Script to Store and Retrieve
// the values and states of common form elements
// TEXT BOXES - value
// TEXT AREA - value
// CHECK BOX - checked state
// RADIO BUTTON - checked state
// SELECT LIST - selected Index
// Application Notes and Customising Variables
// Application Notes
// Values and states of each element are stored
// as the page is unloaded or form submitted.
// The storage duration is specified by a customising variable
// Stored values and states of elements included in the cookie
// are re-established as the page is reloaded.
// The number and type of elements included must respect
// the maximum cookie size of 4K.
// The Retrieval is initialised by a <BODY> onload event
// The Storage occurs on a <BODY> onunload event
// e.g.
// <body onload="f19_GetFormCookie();" onunload="f19_SetFormCookie();" >
// To include a form element in the Store and Retrieve
// it must be child nodes of an element with a title of 'f19_Include'
// e.g.
// <span title="f19_Include" >
// <INPUT type="text" size="10" >
// <INPUT type="checkbox >
// </span>
// There may be any number of elements titled 'f19_Include' on a page
// and as many child elements of each 'f19_Include' as required.
// All variable, function etc. names are prefixed with 'f19_'
// to minimise conflicts with other JavaScripts
// Customising Variables
var f19_Days = 1; // The cookie will be available on revisits for a specified number of days
var f19_Cookie = 'My Form2'; // The Cookie name
//-->
</script>
<script language="JavaScript" type="text/javascript">
<!--
// Form Compendium f19_Part2 (12-05-2005)
// Functional Code
// No Need To Change ***************************
var f19_TBAry = new Array();
var f19_RCAry = new Array();
var f19_TAAry = new Array();
var f19_SLAry = new Array();
var f19_TBString, f19_RCString, f19_TAString, f19_SLString;
var f19_, f19_exp, f19_st, f19_len, f19_end, f19_st;
var f19_Exp = new Date(new Date().getTime() + f19_Days * 86400000).toGMTString();
function f19_GetFormCookie() {
f19_TBString = f19_GetCookie(f19_Cookie + 'TB');
f19_RCString = f19_GetCookie(f19_Cookie + 'RC');
f19_SLString = f19_GetCookie(f19_Cookie + 'SL');
f19_TAString = f19_GetCookie(f19_Cookie + 'TA');
f19_ = document.getElementsByTagName('*');
for (f19_0 = 0; f19_0 < f19_.length; f19_0++) {
if (f19_[f19_0].title == 'f19_Include') {
f19_Inc = f19_[f19_0].getElementsByTagName('*');
for (f19_1 = 0; f19_1 < f19_Inc.length; f19_1++) {
if (f19_Inc[f19_1].tagName == 'INPUT') {
if (f19_Inc[f19_1].type == 'text') {
f19_TBAry[f19_TBAry.length] = f19_Inc[f19_1];
}
if (f19_Inc[f19_1].type == 'radio' || f19_Inc[f19_1].type == 'checkbox') {
f19_RCAry[f19_RCAry.length] = f19_Inc[f19_1];
}
}
if (f19_Inc[f19_1].tagName == 'TEXTAREA') {
f19_TAAry[f19_TAAry.length] = f19_Inc[f19_1];
}
if (f19_Inc[f19_1].tagName == 'SELECT') {
f19_SLAry[f19_SLAry.length] = f19_Inc[f19_1];
}
}
}
}
if (f19_TBString) {
for (f19_1 = 0; f19_1 < f19_TBAry.length; f19_1++) {
f19_TBAry[f19_1].value = f19_TBString.split('~^~')[f19_1];
}
}
if (f19_RCString) {
for (f19_2 = 0; f19_2 < f19_RCAry.length; f19_2++) {
f19_RCAry[f19_2].checked = false;
if (f19_RCString.split('~^~')[f19_2] == 'true') {
f19_RCAry[f19_2].checked = true;
}
}
}
if (f19_TAString) {
for (f19_3 = 0; f19_3 < f19_TAAry.length; f19_3++) {
f19_TAAry[f19_3].value = f19_TAString.split('~^~')[f19_3];
}
}
if (f19_SLString) {
for (f19_4 = 0; f19_4 < f19_SLAry.length; f19_4++) {
f19_SLAry[f19_4].selectedIndex = f19_SLString.split('~^~')[f19_4];
}
}
}
function f19_GetCookie(name) {
var f19_st = document.cookie.indexOf(name + "=");
var f19_len = f19_st + name.length + 1;
if ((!f19_st) && (name != document.cookie.substring(0, name.length))) return null;
if (f19_st == -1) return null;
var f19_end = document.cookie.indexOf(";", f19_len);
if (f19_end == -1) f19_end = document.cookie.length;
return decodeURI(document.cookie.substring(f19_len, f19_end));
}
function f19_SetFormCookie(value) {
f19_TBString = '';
for (f19_0 = 0; f19_0 < f19_TBAry.length; f19_0++) {
f19_TBString += f19_TBAry[f19_0].value + '~^~';
}
document.cookie = f19_Cookie + "TB=" + encodeURI(f19_TBString) + ";expires=" + f19_Exp + ";path=/;"
f19_RCString = '';
for (f19_1 = 0; f19_1 < f19_RCAry.length; f19_1++) {
f19_RCString += f19_RCAry[f19_1].checked + '~^~';
}
document.cookie = f19_Cookie + "RC=" + encodeURI(f19_RCString) + ";expires=" + f19_Exp + ";path=/;"
f19_TAString = '';
for (f19_0 = 0; f19_0 < f19_TAAry.length; f19_0++) {
f19_TAString += f19_TAAry[f19_0].value + '~^~';
}
document.cookie = f19_Cookie + "TA=" + encodeURI(f19_TAString) + ";expires=" + f19_Exp + ";path=/;"
f19_SLString = '';
for (f19_1 = 0; f19_1 < f19_SLAry.length; f19_1++) {
f19_SLString += f19_SLAry[f19_1].selectedIndex + '~^~';
}
document.cookie = f19_Cookie + "SL=" + encodeURI(f19_SLString) + ";expires=" + f19_Exp + ";path=/;"
}
//-->
</script>
</body>
</html>

You can use onclick event on radio buttons:
http://www.dyn-web.com/tutorials/forms/radio/onclick-onchange.php
You could modify your code to use Buttons instead RadioButtons.
It should resemble the following:
<button name="b1" onclick="f19_SetFormCookie('Baseball')">Baseball</button>
<button name="b2" onclick="f19_SetFormCookie('Basketball')">Basketball</button>
<button name="b3" onclick="f19_SetFormCookie('Soccer')">Soccer</button>
<button name="b4" onclick="f19_SetFormCookie('Fencing')">Fencing</button>
Then you'll have to modify SetFormCookie function to accept the argument - based on which cookie will be set.

Allow to select only predifened combination from available values

let us say we have parameter with A,B,C and D values. Now we want to force the user to choose only A,B,C or A,C,D or A or B or C.
Instead of Allowing all possible 16 combination, we want to allow only 5 predefined combination. I tried it but for this i have to put condition for each and every selection.
If we assume this values are bind with checkbox and we need to check whether selected values are as per our predifined combination or not.
I need to achieve this in javascript or either angular.js. Please help me with proper algorithm for such operation.
I tried below logic to achieve this but this will not infor user instantly, alert only after final submission
// multi-dimentional array of defined combinations
var preDefinedCombinations = [['a','b','c'], ['a','c','d'], ['a'], ['b'], ['c']];
// Combination user select
var selectedvalues = [];
// Function called on selection or removing value (i.e a,b,c,d)
function selectOption(value){
var checkIndex = selectedvalues.indexof(value);
if(checkIndex == -1){
selectedvalues.push(value);
}else{
selectedvalues.splice(checkIndex, 1);
}
}
// function called on submition of combination
function checkVaildCombination(){
if(preDefinedCombinations.indexOf(selectedvalues) == -1){
alert('Invalid Combination');
}else{
alert('Valid Combination');
}
}
This code gives information only about combination is valid or not, not about which may be possible combinations as per selections.

stolen from https://stackoverflow.com/a/1885660/1029988 :
function intersect_safe(a, b)
{
var ai=0, bi=0;
var result = new Array();
while( ai < a.length && bi < b.length )
{
if (a[ai] < b[bi] ){ ai++; }
else if (a[ai] > b[bi] ){ bi++; }
else /* they're equal */
{
result.push(a[ai]);
ai++;
bi++;
}
}
return result;
}
then in your code:
function checkVaildCombination(){
function get_diff(superset, subset) {
var diff = [];
for (var j = 0; j < superset.length; j++) {
if (subset.indexOf(superset[j]) == -1) { // actual missing bit
diff.push(superset[j]);
}
}
return diff;
}
if(preDefinedCombinations.indexOf(selectedvalues) == -1){
missing_bits = [];
diffed_bits = [];
for (var i = 0; i < preDefinedCombinations.length; i++) {
var intersection = intersect_safe(preDefinedCombinations[i], selectedvalues);
if (intersection.length == selectedvalues.length) { // candidate for valid answer
missing_bits.push(get_diff(preDefinedCombinations[i], intersection));
} else {
var excess_bits = get_diff(selectedvalues, intersection),
missing_bit = get_diff(preDefinedCombinations[i], intersection);
diffed_bits.push({
excess: excess_bits,
missing: missing_bit
});
}
}
var message = 'Invalid Combination, if you select any of these you`ll get a valid combination:\n\n' + missing_bits.toString();
message += '\n\n Alternatively, you can reach a valid combination by deselected some bits and select others:\n';
for (var j = 0; j < diffed_bits.length; j++) {
message += '\ndeselect: ' + diffed_bits[j].excess.toString() + ', select: ' + diffed_bits[j].missing.toString();
}
alert(message);
} else {
alert('Valid Combination');
}
}
you will of course want to format the output string, but that code will (hopefully, it is napkin code after all) give you the missing bits to make valid combos with what you've got selected already

May be following code could help you to solve ur problem
<script>
function validateForm(){
var checkBoxValues = this.a.checked.toString() + this.b.checked.toString() + this.c.checked.toString() + this.d.checked.toString();
if( checkBoxValues == 'truetruetruefalse' || // abc
checkBoxValues == 'truefalsetruetrue' || // acd
checkBoxValues == 'truefalsefalsefalse' || // a
checkBoxValues == 'falsetruefalsefalse' || // b
checkBoxValues == 'falsefalsetruefalse' ){ // c
return true;
}
return false;
}
</script>
<form onsubmit="return validateForm()" action="javascript:alert('valid')">
<input type="checkbox" name="mygroup" id="a">
<input type="checkbox" name="mygroup" id="b">
<input type="checkbox" name="mygroup" id="c">
<input type="checkbox" name="mygroup" id="d">
<input type="submit">
</form>

I have a JS script in my php file, and it does not seem to be executing

This started after I converted this same script which was previously laid out in PHP to JS (I tried to change all the syntax.)
I have tried running it how it is within the php file and it didn't work :
<html>
<head>
<title>Learn | A Level Scientist</title>
<link rel="shortcut icon" href="http://www.iconj.com/ico/f/0/f0ghi1ksdc.ico" type="image/x-icon" />
<style>
#menubar {;color:white;font-size:100%;padding-top:5px;padding-bottom:5px;
border-radius:5px;margin-top: 1%;margin-bottom:1%;margin-left:4%;margin-right:4%; background: rgba(0,73,126,0.6);}
span {margin-left:2.5%;margin-right:2.5%;}
#mainsection {background: rgba(0,73,126,0.6);color:white;margin-left:4%;margin-right:4%;border-radius:5px;padding-left:20px;padding-right:20px;padding-bottom:0.5%;text-align:center;}
body {background:radial-gradient(#00477C,#002E4F);}
#horizsep {width:100%;text-align:center;color:white;padding-top:0%;padding-bottom:0%;margin:0px}
#copyright{text-align:center;}
#welcomemsg {font-size:30px;margin:0px;padding:0px}
#surroundmid{font-size:26px; padding-bottom:160px;}
#start_learning:hover {width:155px;font-size:22px;color:white;background-color:#5288AB;border-width:0px;border-radius:5px;}
#tube_part {background-color:#DB2625;margin:0%;}
#you_part {margin:0%;color:black;border-radius:30px;text-align:center}
#fb_part {background-color:#3B5998;color:white;margin:0%;text-align:center}
#acebook_part {background-color:#3B5998;margin:0%}
a{color:white; underline:none}
a:hover {color: #4DB849 ; underline:none}
a:hover {color: #4DB849 ; underline:none}
a:hover {color: #4DB849 ; underline:none}
a:clicked {color: white; underline:none}
*.menubar {border-width:0px;border-radius:1px;background:rgba(0,0,0,0.1);color:white;}
*.menubar:hover{color:white;background-color:#5288AB;border-width:0px;border-radius:1px;}
#loginform {display:inline-block;margin:0px}
#chembutton {width:30%;height:10%;font-size:40px;color:white;background:rgba(17,214,118,0.3);border-width:0px;border-radius:5px;}
#chembutton:hover {width:32%;height:11%;font-size:45px;color:white;background:rgba(17,214,118,0.5);border-width:0px;border-radius:5px;}
#chembutton:active {width:33%;height:12%;font-size:45px;color:white;background:rgba(17,214,118,0.7);border-width:0px;border-radius:5px;}
#ytvid {margin-top:0%;margin-bottom:4.7%}
#video_navigation_next {width:40%;display:inline-block;}
#video_navigation_previous {width:40%;display:inline-block;}
#interface {display:block;width:900px;height:500px;background:rgba(0,46,79,0.4);margin:auto;border-radius:5px;margin-top:5px;margin-bottom:20px;vertical-align:top;}
#output{width:550px;border-radius:5px;height:450px;background:rgba(47,94,130,0.4);display:inline-block;margin:25px;vertical-align:top;font-size:18px}
#input{width:250px;border-radius:5px;height:450px;background:rgba(47,94,130,0.4);display:inline-block;margin:25px;margin-left:0px;vertical-align:top;}
#useranswer {margin-top:40px}
#helpsection {margin:10%}
</style>
</head>
<body>
<section>
<?php
include 'C:\xampp\htdocs\ALevelScientistTesting\menubar.php' ;
?>
<div id="mainsection">
<div id="welcomemsg"><strong><u> Working out Relative Formula/Molecular Masses </u></strong></div><br>
<div id="video_navigation_previous"><br><span id="nextvid"> <!-- <= Go to the Previous Exercise --> <span></div>
<div id="video_navigation_next"><br><span id="nextvid"> Go to the Next Exercise => <span></div>
<div id="interface">
<div id="output">
<?php
//echo 'The '.$CoMo.' : '.$SubName[$FormNo].' Has a Relative '.$FoMo.' Mass of : '.$x;
//echo '<br> Work out the Relative '.$FoMo.' Mass of the '.$CoMo.' : '.$SubName[$FormNo] ;
?>
<script type="text/javascript">
document.write('The Program got to here...');
//The following 3 Arrays store 3 things. 1) The Element names. 2) The element Symbols. 3) The Relative Atomic Masses of the Elements.
var Elements = new Array("Hydrogen","Lithium","Sodium","Potassium","Rubidium","Caesium","Francium","Beryllium","Magnesium","Calcium","Strontium","Barium","Radium","Scandium","Yttrium","Lanthanum","Actinium","Titanium","Zirconium","Halfnium","Rutherfordium","Vanadium","Niobium","Tantalum","Dubnium","Chromium","Molybdenum","Tungsten","Seaborgium","Manganese","Technetium","Rhenium","Bohrium","Iron","Ruthenium","Osmium","Hassium","Cobalt","Rhodium","Iridium","Meitnerium","Nickel","Palladium","Platinum","Darmstadtium","Copper","Silver","Gold","Roentgenium","Zinc","Cadmium","Mercury","Boron","Aluminum","Gallium","Indium","Thallium","Carbon","Silicon","Germanium","Tin","Lead","Nitrogen","Phosphorus","Arsenic","Antimony","Bismuth","Oxygen","Sulfur","Selenium","Tellurium","Polonium","Flourine","Chlorine","Bromine","Iodine","Astatine","Helium","Neon","Argon","Krypton","Xenon","Radon");
var ElementsSym = new Array("H","Li","Na","K","Rb","Cs","Fr","Be","Mg","Ca","Sr","Ba","Ra","Sc","Y","La","Ac","Ti","Zr","Hf","Rf","V","Nb","Ta","Db","Cr","Mo","W","Sg","Mn","Tc","Re","Bh","Fe","Ru","Os","Hs","Co","Rh","Ir","Mt","Ni","Pd","Pt","Ds","Cu","Ag","Au","Rg","Zn","Cd","Hg","B","Al","Ga","In","Tl","C","Si","Ge","Sn","Pb","N","P","As","Sb","Bi","O","S","Se","Te","Po","F","Cl","Br","I","At","He","Ne","Ar","Kr","Xe","Rn");
var ElementsRAM = new Array("1.0","6.9","23.0","39.1","85.5","132.9","223","9.0","24.3","40.1","87.6","137.3","226","45.0","88.9","138.9","227","47.9","91.2","178.5","261","50.9","92.9","180.9","262","52.0","95.9","183.8","266","54.9","98","186.2","264","55.8","101.1","190.2","277","58.9","102.9","192.2","268","58.7","106.4","195.1","271","63.5","107.9","197.0","272","65.4","112.4","200.6","10.8","27.0","69.7","114.8","204.4","12.0","28.1","72.6","118.7","207.2","14.0","31.0","74.9","121.8","209.0","16.0","32.1","79.0","127.6","209","19.0","35.5","79.9","126.9","210","4.0","20.2","39.9","83.8","131.3","222");
// The following 3 arrays store all of the molecule names and formulas, along with the subscripted versions of all of the formulas.
var CompoundsFormula = new Array("Al2O3","NH4N3","NH4ClO3","NH4ClO4","BaCrO4","BeCO3","C6H12N2O4Pt","CrO2F2","C3Cl3N3","GaP","LiCoO2","FeLiO4P","Li2SO4","OF2","KCaCl3","Ag2CrO4","AgBF4","H3NO3S","ZnBr2","Na2CO3","BaFe2O4","BrF5","CaCrO4","H2CO3","MgCO3","AgClO3","Ag3PO4","NaPO2H2","NaMnO4","Na2S2O8");
var CompoundsName = new Array("Aluminium oxide","Ammonium azide","Ammonium chlorate","Ammonium perchlorate","Barium chromate","Beryllium carbonate","Carboplatin","Chromyl fluoride","Cyanuric chloride","Gallium phosphide","Lithium cobalt oxide","Lithium iron phosphate","Lithium sulfate","Oxygen difluoride","Potassium calcium chloride","Silver chromate","Silver fluoroborate","Sulfamic acid","Zinc bromide","Sodium carbonate","Barium ferrite","Bromine pentafluoride","Calcium chromate","Carbonic acid","Magnesium carbonate","Silver chlorate","Silver orthophosphate","Sodium hypophosphite","Sodium permanganate","Sodium persulfate");
var SubCompoundsArray = new Array("Al<sub>2</sub>O<sub>3</sub>","NH<sub>4</sub>N<sub>3</sub>","NH<sub>4</sub>ClO<sub>3</sub>","NH<sub>4</sub>ClO<sub>4</sub>","BaCrO<sub>4</sub>","BeCO<sub>3</sub>","C<sub>6</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>4</sub>Pt","CrO<sub>2</sub>F<sub>2</sub>","C<sub>3</sub>Cl<sub>3</sub>N<sub>3</sub>","GaP","LiCoO<sub>2</sub>","FeLiO<sub>4</sub>P","Li<sub>2</sub>SO<sub>4</sub>","OF<sub>2</sub>","KCaCl<sub>3</sub>","Ag<sub>2</sub>CrO<sub>4</sub>","AgBF<sub>4</sub>","H<sub>3</sub>NO<sub>3</sub>S","ZnBr<sub>2</sub>","Na<sub>2</sub>CO<sub>3</sub>","BaFe<sub>2</sub>O<sub>4</sub>","BrF<sub>5</sub>","CaCrO<sub>4</sub>","H<sub>2</sub>CO<sub>3</sub>","MgCO<sub>3</sub>","AgClO<sub>3</sub>","Ag<sub>3</sub>PO<sub>4</sub>","NaPO<sub>2</sub>H<sub>2</sub>","NaMnO<sub>4</sub>","Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub>");
// The following 3 arrays store all the compound names and formulas, along with the subscripted versions of all the formulas.
var MoleculesFormula = new Array("C15H20O4","C12H8","CH3CO2Na","C3H4O2","C60","C6H12O6","C5H9N1O4","C5H8O4","CN","H2O2","C13H18O2","C12H22O11","C14H14O3","C10H8","C14H18N2O5","C18H22O2","C3H3O3","C7H5N1O3S1","C5H6N2O2","C3H9N","C16H13Cl1N2O1","C19H16O4","C6H3N3O6","C8H8O3","C21H22N2O2","C6H14O6","C9H11N1O6","C10H20O1","C8N8O16","C6H6N12O12","C6H5NO2");
var MoleculesName = new Array("Abscisic acid","Acenaphthylene","Sodium acetate","Acroleic acid","Buckminsterfullerene","Fructose","Glutamate","Glutaric acid","Hydrogen Cyanide","Hydrogen Peroxide","Ibuprofen","Beta-Lactose","Naproxen","Naphthalene","Aspartame","Estrone","Pyruvate","Saccharin","Thymine","Trimethylamine","Diazepam","Warfarin","Trinitrobenzene","Vanillin","Strychnine","Sorbitol","Showdomycin","Menthol","Octanitrocubane","Hexanitrohexaazaisowurtzitane","Nitrobenzene");
var SubMoleculesArray = new Array("C<sub>1</sub><sub>5</sub>H<sub>2</sub><sub>0</sub>O<sub>4</sub>","C<sub>1</sub><sub>2</sub>H<sub>8</sub>","CH<sub>3</sub>CO<sub>2</sub>Na","C<sub>3</sub>H<sub>4</sub>O<sub>2</sub>","C<sub>6</sub><sub>0</sub>","C<sub>6</sub>H<sub>1</sub><sub>2</sub>O<sub>6</sub>","C<sub>5</sub>H<sub>9</sub>N<sub>1</sub>O<sub>4</sub>","C<sub>5</sub>H<sub>8</sub>O<sub>4</sub>","CN","H<sub>2</sub>O<sub>2</sub>","C<sub>1</sub><sub>3</sub>H<sub>1</sub><sub>8</sub>O<sub>2</sub>","C<sub>1</sub><sub>2</sub>H<sub>2</sub><sub>2</sub>O<sub>1</sub><sub>1</sub>","C<sub>1</sub><sub>4</sub>H<sub>1</sub><sub>4</sub>O<sub>3</sub>","C<sub>1</sub><sub>0</sub>H<sub>8</sub>","C<sub>1</sub><sub>4</sub>H<sub>1</sub><sub>8</sub>N<sub>2</sub>O<sub>5</sub>","C<sub>1</sub><sub>8</sub>H<sub>2</sub><sub>2</sub>O<sub>2</sub>","C<sub>3</sub>H<sub>3</sub>O<sub>3</sub>","C<sub>7</sub>H<sub>5</sub>N<sub>1</sub>O<sub>3</sub>S<sub>1</sub>","C<sub>5</sub>H<sub>6</sub>N<sub>2</sub>O<sub>2</sub>","C<sub>3</sub>H<sub>9</sub>N","C<sub>1</sub><sub>6</sub>H<sub>1</sub><sub>3</sub>Cl<sub>1</sub>N<sub>2</sub>O<sub>1</sub>","C<sub>1</sub><sub>9</sub>H<sub>1</sub><sub>6</sub>O<sub>4</sub>","C<sub>6</sub>H<sub>3</sub>N<sub>3</sub>O<sub>6</sub>","C<sub>8</sub>H<sub>8</sub>O<sub>3</sub>","C<sub>2</sub><sub>1</sub>H<sub>2</sub><sub>2</sub>N<sub>2</sub>O<sub>2</sub>","C<sub>6</sub>H<sub>1</sub><sub>4</sub>O<sub>6</sub>"," C<sub>9</sub>H<sub>1</sub><sub>1</sub>N<sub>1</sub>O<sub>6</sub>","C<sub>1</sub><sub>0</sub>H<sub>2</sub><sub>0</sub>O<sub>1</sub>","C<sub>8</sub>N<sub>8</sub>O<sub>1</sub><sub>6</sub>","C<sub>6</sub>H<sub>6</sub>N<sub>1</sub><sub>2</sub>O<sub>1</sub><sub>2</sub>","C<sub>6</sub>H<sub>5</sub>NO<sub>2</sub>");
//The following part is the section where the specific Formula will be randomly selected for the questions.
var MCselection = Math.floor(Math.random()*2);
document.write(MCselection);
if(MCselection == 0) {
var Formula = CompoundsFormula;
var Name = CompoundsName;
var SubName = SubCompoundsArray;
var CoMo = 'Compound';
var FoMo = 'Formula';
} else {
var Formula = MoleculesFormula;
var Name = MoleculesName;
var SubName = SubMoleculesArray;
var CoMo = 'Molecule';
var FoMo = 'Molecular';
}
var FormNo = Math.floor(Math.random()*30);
var Form = Formula[FormNo];
var FormName = Name[FormNo];
var FormSub = SubName[FormNo];
var ElementSub = new Array();
var FoRAM = new Array();
var ElemProduct = new Array();
// Note : This is the substring Syntax : ACTUAL_STRINGHERE.substr(start,length)
// Note : is_numeric will return TRUE if the substring in question is a number. False Otherwise.
var l = 0;
var y = 0;
// The following Code is going to strip away the elements and each corresponding number of moles
// of each element per unit compound/molecule into separate arrays.
while (l < Form.length)) {
if(Form.substr(l+1,1).toLowerCase()==Form.substr(l+1,1) || !isNaN(Form.substr(l+1,1))) {
if (!isNaN(Form.substr(l+1,1))) {
Element[y] = Form.substr(l,1);
if (!isNaN(Form.substr(l+2,1))) {
ElementSub[y] = Form.substr(l+1,2);
l++;
l++;
} else {
ElementSub[y] = Form.substr(l+1,1);
l++;
}
} else {
Element[y] = Form.substr(l,2);
if (!isNaN(Form.substr(l+2,1))) {
if (!isNaN(Form.substr(l+3,1))) {
ElementSub[y] = Form.substr(l+2,2);
l+=3;
} else {
ElementSub[y] = Form.substr(l+2,1);
l+=2;
}
} else {
ElementSub[y] = 1;
l++;
}
}
} else {
Element[y] = Form.substr(l,1);
ElementSub[y] = 1;
}
l++;
y++;
}
// this resets the value of $l to 0 so that it can be recycled for another while loop.
l = 0;
x = 0;
// The following Code Identifies The Different Elements Present in the Array.
while(x < Element.length) {
while(l < ElementsSym.length) {
if (ElementsSym[l]==Element[x]) {
FoRAM[x] = ElementsRAM[l];
}
l++;
}
l = 0;
x++;
}
// this also resets the value of $l to 0 so that it can be recycled for another while loop.
l = 0;
x = 0;
// This find the product of each element multiplied by the number of moles present per mole of the formula.
while(l<Element.length) {
ElemProduct[l] = FoRAM[l]*ElementSub[l];
// echo '<br>';
l++;
}
// This finds the total of all the molar elemental products b adding up the values in an array.
//x = array_sum(ElemProduct);
var n = 0;
var sum = 0;
while(n<ElemProduct.length) {
sum += ElemProduct[n];
n++;
}
document.write("The " + CoMo + " : " + SubName[FormNo] + " Has a Relative " + FoMo + " Mass of : " + sum );
// The following Line Presents the Information.
</script>
<script type="text/javascript">
</script>
<br><hr>
</div>
<div id="input">
<form id="useranswer">
Enter Your Answer Here<br>
<input type="text" id="useranswer"><br>
<input type="submit" id="usersubmit" value="Check Answer">
</form>
<div id="helpsection">
<hr><br>
Not sure what Relative Formula mass is? <br>
<a>Click Here.</a> <br>
Not sure what Relative Molecular mass is?<br>
<a>Click Here.</a>
<br>
<hr>
<br>
Haven't learned how to work this out yet? <br>
<a>Click Here.</a>
</div>
</div>
</div>
<hr>
<span id="copyright"> Copyright A Level Scientist 2014 | All rights reserved. <span>
</div>
</section>
</body>
</html>
When I run this code at the moment, the result looks like this :
http://postimg.org/image/6993cuaqb/
Can someone please explain to me what is wrong with the code at the moment ! Thank you :)
---EDIT /
This is my new script, it kind of works, but does not. If someone would kindly test it you may get an insight into what i'm talking about (NAN, Long decimals.). When you're testing it, refresh multiple times and look at what happens.
New Script :
<html>
<head></head>
<body>
<script>
//The following 3 Arrays store 3 things. 1) The Element names. 2) The element Symbols. 3) The Relative Atomic Masses of the Elements.
var Elements = new Array("Hydrogen","Lithium","Sodium","Potassium","Rubidium","Caesium","Francium","Beryllium","Magnesium","Calcium","Strontium","Barium","Radium","Scandium","Yttrium","Lanthanum","Actinium","Titanium","Zirconium","Halfnium","Rutherfordium","Vanadium","Niobium","Tantalum","Dubnium","Chromium","Molybdenum","Tungsten","Seaborgium","Manganese","Technetium","Rhenium","Bohrium","Iron","Ruthenium","Osmium","Hassium","Cobalt","Rhodium","Iridium","Meitnerium","Nickel","Palladium","Platinum","Darmstadtium","Copper","Silver","Gold","Roentgenium","Zinc","Cadmium","Mercury","Boron","Aluminum","Gallium","Indium","Thallium","Carbon","Silicon","Germanium","Tin","Lead","Nitrogen","Phosphorus","Arsenic","Antimony","Bismuth","Oxygen","Sulfur","Selenium","Tellurium","Polonium","Flourine","Chlorine","Bromine","Iodine","Astatine","Helium","Neon","Argon","Krypton","Xenon","Radon");
var ElementsSym = new Array("H","Li","Na","K","Rb","Cs","Fr","Be","Mg","Ca","Sr","Ba","Ra","Sc","Y","La","Ac","Ti","Zr","Hf","Rf","V","Nb","Ta","Db","Cr","Mo","W","Sg","Mn","Tc","Re","Bh","Fe","Ru","Os","Hs","Co","Rh","Ir","Mt","Ni","Pd","Pt","Ds","Cu","Ag","Au","Rg","Zn","Cd","Hg","B","Al","Ga","In","Tl","C","Si","Ge","Sn","Pb","N","P","As","Sb","Bi","O","S","Se","Te","Po","F","Cl","Br","I","At","He","Ne","Ar","Kr","Xe","Rn");
var ElementsRAM = new Array(1.0,6.9,23.0,39.1,85.5,132.9,223,9.0,24.3,40.1,87.6,137.3,226,45.0,88.9,138.9,227,47.9,91.2,178.5,261,50.9,92.9,180.9,262,52.0,95.9,183.8,266,54.9,98,186.2,264,55.8,101.1,190.2,277,58.9,102.9,192.2,268,58.7,106.4,195.1,271,63.5,107.9,197.0,272,65.4,112.4,200.6,10.8,27.0,69.7,114.8,204.4,12.0,28.1,72.6,18.7,207.2,14.0,31.0,74.9,121.8,209.0,16.0,32.1,79.0,127.6,209,19.0,35.5,79.9,126.9,210,4.0,20.2,39.9,83.8,131.3,222);
// The following 3 arrays store all of the molecule names and formulas, along with the subscripted versions of all of the formulas.
var CompoundsFormula = new Array("Al2O3","NH4N3","NH4ClO3","NH4ClO4","BaCrO4","BeCO3","C6H12N2O4Pt","CrO2F2","C3Cl3N3","GaP","LiCoO2","FeLiO4P","Li2SO4","OF2","KCaCl3","Ag2CrO4","AgBF4","H3NO3S","ZnBr2","Na2CO3","BaFe2O4","BrF5","CaCrO4","H2CO3","MgCO3","AgClO3","Ag3PO4","NaPO2H2","NaMnO4","Na2S2O8");
var CompoundsName = new Array("Aluminium oxide","Ammonium azide","Ammonium chlorate","Ammonium perchlorate","Barium chromate","Beryllium carbonate","Carboplatin","Chromyl fluoride","Cyanuric chloride","Gallium phosphide","Lithium cobalt oxide","Lithium iron phosphate","Lithium sulfate","Oxygen difluoride","Potassium calcium chloride","Silver chromate","Silver fluoroborate","Sulfamic acid","Zinc bromide","Sodium carbonate","Barium ferrite","Bromine pentafluoride","Calcium chromate","Carbonic acid","Magnesium carbonate","Silver chlorate","Silver orthophosphate","Sodium hypophosphite","Sodium permanganate","Sodium persulfate");
var SubCompoundsArray = new Array("Al<sub>2</sub>O<sub>3</sub>","NH<sub>4</sub>N<sub>3</sub>","NH<sub>4</sub>ClO<sub>3</sub>","NH<sub>4</sub>ClO<sub>4</sub>","BaCrO<sub>4</sub>","BeCO<sub>3</sub>","C<sub>6</sub>H<sub>1</sub><sub>2</sub>N<sub>2</sub>O<sub>4</sub>Pt","CrO<sub>2</sub>F<sub>2</sub>","C<sub>3</sub>Cl<sub>3</sub>N<sub>3</sub>","GaP","LiCoO<sub>2</sub>","FeLiO<sub>4</sub>P","Li<sub>2</sub>SO<sub>4</sub>","OF<sub>2</sub>","KCaCl<sub>3</sub>","Ag<sub>2</sub>CrO<sub>4</sub>","AgBF<sub>4</sub>","H<sub>3</sub>NO<sub>3</sub>S","ZnBr<sub>2</sub>","Na<sub>2</sub>CO<sub>3</sub>","BaFe<sub>2</sub>O<sub>4</sub>","BrF<sub>5</sub>","CaCrO<sub>4</sub>","H<sub>2</sub>CO<sub>3</sub>","MgCO<sub>3</sub>","AgClO<sub>3</sub>","Ag<sub>3</sub>PO<sub>4</sub>","NaPO<sub>2</sub>H<sub>2</sub>","NaMnO<sub>4</sub>","Na<sub>2</sub>S<sub>2</sub>O<sub>8</sub>");
// The following 3 arrays store all the compound names and formulas, along with the subscripted versions of all the formulas.
var MoleculesFormula = new Array("C15H20O4","C12H8","CH3CO2Na","C3H4O2","C60","C6H12O6","C5H9N1O4","C5H8O4","CN","H2O2","C13H18O2","C12H22O11","C14H14O3","C10H8","C14H18N2O5","C18H22O2","C3H3O3","C7H5N1O3S1","C5H6N2O2","C3H9N","C16H13Cl1N2O1","C19H16O4","C6H3N3O6","C8H8O3","C21H22N2O2","C6H14O6","C9H11N1O6","C10H20O1","C8N8O16","C6H6N12O12","C6H5NO2");
var MoleculesName = new Array("Abscisic acid","Acenaphthylene","Sodium acetate","Acroleic acid","Buckminsterfullerene","Fructose","Glutamate","Glutaric acid","Hydrogen Cyanide","Hydrogen Peroxide","Ibuprofen","Beta-Lactose","Naproxen","Naphthalene","Aspartame","Estrone","Pyruvate","Saccharin","Thymine","Trimethylamine","Diazepam","Warfarin","Trinitrobenzene","Vanillin","Strychnine","Sorbitol","Showdomycin","Menthol","Octanitrocubane","Hexanitrohexaazaisowurtzitane","Nitrobenzene");
var SubMoleculesArray = new Array("C<sub>1</sub><sub>5</sub>H<sub>2</sub><sub>0</sub>O<sub>4</sub>","C<sub>1</sub><sub>2</sub>H<sub>8</sub>","CH<sub>3</sub>CO<sub>2</sub>Na","C<sub>3</sub>H<sub>4</sub>O<sub>2</sub>","C<sub>6</sub><sub>0</sub>","C<sub>6</sub>H<sub>1</sub><sub>2</sub>O<sub>6</sub>","C<sub>5</sub>H<sub>9</sub>N<sub>1</sub>O<sub>4</sub>","C<sub>5</sub>H<sub>8</sub>O<sub>4</sub>","CN","H<sub>2</sub>O<sub>2</sub>","C<sub>1</sub><sub>3</sub>H<sub>1</sub><sub>8</sub>O<sub>2</sub>","C<sub>1</sub><sub>2</sub>H<sub>2</sub><sub>2</sub>O<sub>1</sub><sub>1</sub>","C<sub>1</sub><sub>4</sub>H<sub>1</sub><sub>4</sub>O<sub>3</sub>","C<sub>1</sub><sub>0</sub>H<sub>8</sub>","C<sub>1</sub><sub>4</sub>H<sub>1</sub><sub>8</sub>N<sub>2</sub>O<sub>5</sub>","C<sub>1</sub><sub>8</sub>H<sub>2</sub><sub>2</sub>O<sub>2</sub>","C<sub>3</sub>H<sub>3</sub>O<sub>3</sub>","C<sub>7</sub>H<sub>5</sub>N<sub>1</sub>O<sub>3</sub>S<sub>1</sub>","C<sub>5</sub>H<sub>6</sub>N<sub>2</sub>O<sub>2</sub>","C<sub>3</sub>H<sub>9</sub>N","C<sub>1</sub><sub>6</sub>H<sub>1</sub><sub>3</sub>Cl<sub>1</sub>N<sub>2</sub>O<sub>1</sub>","C<sub>1</sub><sub>9</sub>H<sub>1</sub><sub>6</sub>O<sub>4</sub>","C<sub>6</sub>H<sub>3</sub>N<sub>3</sub>O<sub>6</sub>","C<sub>8</sub>H<sub>8</sub>O<sub>3</sub>","C<sub>2</sub><sub>1</sub>H<sub>2</sub><sub>2</sub>N<sub>2</sub>O<sub>2</sub>","C<sub>6</sub>H<sub>1</sub><sub>4</sub>O<sub>6</sub>"," C<sub>9</sub>H<sub>1</sub><sub>1</sub>N<sub>1</sub>O<sub>6</sub>","C<sub>1</sub><sub>0</sub>H<sub>2</sub><sub>0</sub>O<sub>1</sub>","C<sub>8</sub>N<sub>8</sub>O<sub>1</sub><sub>6</sub>","C<sub>6</sub>H<sub>6</sub>N<sub>1</sub><sub>2</sub>O<sub>1</sub><sub>2</sub>","C<sub>6</sub>H<sub>5</sub>NO<sub>2</sub>");
//The following part is the section where the specific Formula will be randomly selected for the questions.
var MCselection = Math.floor(Math.random()*2);
if(MCselection === 0) {
var Formula = CompoundsFormula;
var Name = CompoundsName;
var SubName = SubCompoundsArray;
var CoMo = 'Compound';
var FoMo = 'Formula';
} else {
var Formula = MoleculesFormula;
var Name = MoleculesName;
var SubName = SubMoleculesArray;
var CoMo = 'Molecule';
var FoMo = 'Molecular';
}
var FormNo = Math.floor(Math.random()*30);
var Form = Formula[FormNo];
var FormName = Name[FormNo];
var FormSub = SubName[FormNo];
var ElementSub = new Array();
var FoRAM = new Array();
var ElemProduct = new Array();
var Element = new Array();
// Note : This is the substring Syntax : ACTUAL_STRINGHERE.substr(start,length)
// Note : is_numeric will return TRUE if the substring in question is a number. False Otherwise.
var l = 0;
var y = 0;
// The following Code is going to strip away the elements and each corresponding number of moles
// of each element per unit compound/molecule into separate arrays.
while (l <= Form.length) {
if((Form.substr(l+1,1).toLowerCase()==Form.substr(l+1,1)) || (!isNaN(Form.substr(l+1,1)))) {
if (!isNaN(Form.substr(l+1,1))) {
Element[y] = Form.substr(l,1);
if (!isNaN(Form.substr(l+2,1))) {
ElementSub[y] = Form.substr(l+1,2);
l++;
l++;
} else {
ElementSub[y] = Form.substr(l+1,1);
l++;
}
} else {
Element[y] = Form.substr(l,2);
if (!isNaN(Form.substr(l+2,1))) {
if (!isNaN(Form.substr(l+3,1))) {
ElementSub[y] = Form.substr(l+2,2);
l+=3;
} else {
ElementSub[y] = Form.substr(l+2,1);
l+=2;
}
} else {
ElementSub[y] = 1;
l++;
}
}
} else {
Element[y] = Form.substr(l,1);
ElementSub[y] = 1;
}
l++;
y++;
}
document.write(Element);
// this resets the value of $l to 0 so that it can be recycled for another while loop.
l = 0;
x = 0;
// The following Code Identifies The Different Elements Present in the Array.
while(x < Element.length) {
while(l < ElementsSym.length) {
if (ElementsSym[l]==Element[x]) {
FoRAM[x] = ElementsRAM[l];
}
l++;
}
l = 0;
x++;
}
// this also resets the value of $l to 0 so that it can be recycled for another while loop.
l = 0;
x = 0;
// This find the product of each element multiplied by the number of moles present per mole of the formula.
while(l<Element.length) {
ElemProduct[l] = FoRAM[l]*ElementSub[l];
// echo '<br>';
l++;
}
// This finds the total of all the molar elemental products b adding up the values in an array.
//x = array_sum(ElemProduct);
var n = 0;
var sum = 0;
while(n<ElemProduct.length) {
sum += ElemProduct[n];
n++;
}
document.write("<br> The " + CoMo + " : " + SubName[FormNo] + " Has a Relative " + FoMo + " Mass of : " + sum );
// The following Line Presents the Information.
</script>
</body>
</html>
can someone please point me in the right direction as to why this is happening. Thank you.

You have an error on your JS code. On line 125 you have close a bracket too "while (l < Form.length)) {". Fix it by deleting one and try the code

Retrieving Input Values from a Text Box

I need to make a box so that when the user enters a value of one through 6, it rolls that many dice. I'm a complete beginner to javascript and any help would be greatly appreciated.
Here's my function:
function NumberValue() {
for (i = 0; i <['randNumber']; i++){
var numberRoll = Math.floor(Math.random() * 6) + 1;
var userNumber = '../images/die' + numberRoll + '.gif';
myNewTag = "<img id='dieImgRandom' src='" + userNumber + "'>"
document.getElementById('dieDivRandom').innerHTML += myNewTag;
And here is my body element:
<h1>Why don't you pick please?</h1>
<div id="dieDivRandom" style="text-align:center">
<p>
<div id="dieImageRand">
<img id="dieImgRandom" alt="die image" src="../images/die1.gif">
<br>
<input type="text" id="randNumber" size=20 value="Enter 1 through 6">
<input type="button" value="Click to Roll" onclick="NumberValue();">
</div>
The function needs to allow a user to submit the number one, two, three, four, five, or six, and that many images need to display on the screen. The images a relocated in my images folder, so relative links will work just fine. That's actually what I need to use. Thank you.

Replace:
for (i = 0; i <['randNumber']; i++){
With:
for (i = 0; i <document.getElementById('randNumber').value; i++) {
The <input /> tag can be accessed by using either of the following:
document.getElementById('inputId').value;
document.formName.inputName.value
Finally, your code becomes:
function NumberValue() {
for (i = 0; i < document.getElementById('inputId').value; i++) {
var numberRoll = Math.floor(Math.random() * 6) + 1;
var userNumber = '../images/die' + numberRoll + '.gif';
myNewTag = "<img id='dieImgRandom' src='" + userNumber + "'>"
document.getElementById('dieDivRandom').innerHTML += myNewTag;
}
}

Use this to read values from textbox
function NumberValue() {
var ranNum = document.getElementById('randNumber').value;
for (i = 0; i <ranNum ; i++){
}
}
EDIT:
If you want to validate the Entered number
add this block of code
function NumberValue() {
var ranNum = document.getElementById('randNumber').value;
if(ranNum < 1 || ranNum > 6) {
alert("Please enter number from 1 to 6 only");
return false;
}
for (i = 0; i <ranNum ; i++){
}
return true;
}

Check if Number entered is correct By ID - JavaScript

Would like to know how to check true and false and in return give error message if checked and the number is incorrect..
<input name="student1" type="text" size="1" id="studentgrade1"/>
<input name="student2" type="text" size="1" id="studentgrade2"/>
<input name="student3" type="text" size="1" id="studentgrade3"/>
so here we have 3 inputbox , now i would like to check the result by entering number into those inputbox.
studentgrade1 = 78
studentgrade2 = 49
studentgrade3 = 90
<< Using JavaScript >>
So If User entered wrong number e.g "4" into inputbox of (studentgrade1) display error..
same for otherinputbox and if entered correct number display message and says.. correct.
http://jsfiddle.net/JxfcH/5/

OK your question is kinda unclear but i am assuming u want to show error
if the input to the text-box is not equal to some prerequisite value.
here is the modified checkGrade function
function checkgrade() {
var stud1 = document.getElementById("studentgrade1");
VAR errText = "";
if (stud1.exists() && (parseInt(stud1.value) == 78){return true;}
else{errText += "stud1 error";}
//do similiar processing for stud2 and stud 3.
alert(errText);
}

See demo →
I think this is what you're looking for, though I would recommend delimiting your "answer sheet" variable with commas and then using split(',') to make the array:
// answers
var result ="756789";
// turn result into array
var aResult = [];
for (var i = 0, il = result.length; i < il; i+=2) {
aResult.push(result[i]+result[i+1]);
}
function checkgrade() {
var tInput,
msg = '';
for (var i = 0, il = aResult.length; i < il; i++) {
tInput = document.getElementById('studentgrade'+(i+1));
msg += 'Grade ' + (i+1) + ' ' +
(tInput && tInput.value == aResult[i] ? '' : 'in') +
'correct!<br>';
}
document.getElementById('messageDiv').innerHTML = msg;
}
See demo →

Try this http://jsfiddle.net/JxfcH/11/
function checkgrade() {
var stud1 = document.getElementById("studentgrade1");
var stud2 = document.getElementById("studentgrade2");
var stud3 = document.getElementById("studentgrade3");
if (((parseInt(stud1.value) == 78)) && ((parseInt(stud2.value) == 49)) && ((parseInt(stud3.value) == 90)))
{
alert("correct");
}
else
{
alert("error correct those values");
}
}

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