IsNull Error With GetElementById With Variable
Jan 11, 2011
I am normally a VB programmer but now I need get a page to work in Mozilla so I am attempting to convert my VBScript to Javascript. The code in VBScript worked fine. The Javascript version is failing. I see this error on Load: Unexpected Token in Attribute Selector: '!'
If I leave the radio buttons alone, input a non-numeric character in the first field for Length and then tab, I get my alert but the value doesn't change to zero. In the error console, I see the following error: document.getElementById(MyField) is null
I found a couple of ideas to try via web search such as document.getElementById(MyField+'') but get same error. [code]...
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Jul 20, 2005
I have this annoying problem with netscape...
I'm trying to access a form value by using getElementByID and in NS i
end up with a null reference.
The following HTML is the form component that gives me headache:
<form name='task' ...>
....
<select name='prioritySelect' class='selectwidth'>
<option value=''>Choose one</option>
<option value=Ƈ'>Critical</option>
<option value=ƈ'>High</option>
<option value=Ɖ'>Medium</option>
<option value=Ɗ'>Low</option>
</select>
....
</form>
And the related javascript code:
if(document.getElementById("prioritySelect").disabled == false)
{ ... }
When digging into this I can get the desired information by using
document.task.prioritySelect, but that should not be necessary, right?
I hope that anyone knows how to deal with this problem..
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May 10, 2010
I can run the following code in Firefox. But, in IE8 the lines below cause an error:
Code:
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Jul 23, 2005
I have a javascript function which uses the method
document.getElementById.
I'm using it to decide whether a checkbox has been ticked or not. This
decision is encoded in an if statement with the condtion being
if (document.getElementById(checkboxtoupdate).value ==1)
/* The Code */
function set(object)
{
var checkboxtoupdate = object.value;
if (document.getElementById(checkboxtoupdate).value ==1)
document.getElementById(checkboxtoupdate).value = 0;
else
document.getElementById(checkboxtoupdate).value = 1;
}
The "object" accesses a html tag which has an value attribute e.g
value="7400"
However Netscape Navigator 7.1 does not seem to recognise
"document.getElementById(checkboxtoupdate).value"
and reports an error that
document.getElementById(checkboxtoupdate).value has no properties.
But Internet Explorer has no problem with this at all.
Is there another way to do this so as to be recognised by Netscape 7.1?
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Jun 19, 2010
I use in my javascript the "document.getElementById" code.
This code works as it should in Firefox, but in IE I get the following error:
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May 31, 2011
I keep getting an error stating "getElementById("ballElement") is null, but I have a div with that exact id. I have looked at the JS script before that line, but found no errors there either. Please take a minute to see if you find something.
[Code]...
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Jul 6, 2010
Here's my code :
1: function myFunction(myLink, base) {
2: var myCheckBox;
3: var idx;
[Code].....
when I view source of the page , I see the values of sng_ids_{index} hidden parameters set correctly but I get this javascript error :
Error: document.getElementById("sng_ids_"+i.toString()) is null
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Aug 2, 2011
So I was wondering instead of calling document.getElementById('theTest').innerHTML; multiple times is it possible to store this as a variable and then access this later? If I want to change it though Have to go document.getElementById('theTest').innerHTML = something: right?
Is it even worth it to do something like this or is document.getElementById('theTest').innerHTML fast enough?
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Jan 30, 2009
document.getElementById (which + "sel").value = document.getElementById (which + "sel" ).value + "'" + document.getElementById (itemtocheck+i).parentElement.title + "',";
Error: document.getElementById(itemtocheck + i).parentElement is undefined
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Jun 19, 2009
function formsubmit(){
Now im trying to change the image next to the username textbox, the code im using now works within reason.
It changes the image, but it always changes the image to correct.GIF even when it shouldnt. Also the alert box doesnt appear.
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Nov 24, 2010
I seem to be having trouble with my string variable in innerHTML.. here's my code:
function header() { // Navigation Bar
110 var o = document.getElementById("header");
111 var s = '<h3 style="float:left;">'
[code].....
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Dec 29, 2005
I've got a piece of code where, for all the world, it looks like this fails in IE 6:
hometab = document.getElementById('hometab');
but this succeeds:
hometabemt = document.getElementById('hometab');
Has anyone ever seen anything like this before, or am I dreaming?
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Feb 5, 2010
I have a little JS app that is a glorified calculator which I posted the code for below. My code uses the document object to replace the html in the "content" <div> and works great.However, I want to add an inline style in order to change the background of the input (readonly field with an id of "coutput") based on either of the global variables named "MJPD" or "IJPD", (depending on the switch case selected in the user prompt at the beginning of the script.)Simplified....if the value of MJPD is less than 4.6, I want the "coutput" field's background to be red, else be green.The same goes for IJPD, except the threshold for red will be <3.83.Code and what I have tried is below.
<script language="JavaScript">
var MJPD = 1;
var IJPD = 1;
[code].....
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Feb 7, 2010
My code:
function run() {
for(var k = 0; k < newPhotos.length; k++)
{[code]....
I get an error on this line Quotedocument.getElementById(imageId).style.backgroundImage = "url(" + newPhotos[k] + ")";
the error is: QuoteObject Required
I'm just not sure what object they are talking about. This piece of code basically goes through and assigns x amount of divs a background image.
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Aug 24, 2010
I have a php page in which I declared a js variable... right at the top of the page...
<script type="text/javascript">
var tester = 0;
</script>
[code]....
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Sep 14, 2011
im trying to make a program that passes an array to a method. the method then finds the smallest number in the array and passes that number back to the main where its printed out. I am getting an error saying: "error: number cannot be resolved to a variable". I am using drjava. here is my code.
import java.util.*;
public class homeWorkTwo{
public static void main(String[] args)[code].....
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Jul 24, 2009
I modified a little a script from dynamicdrive.com (Animated Collapsible DIV v2.01[URL]... It works well, but something is wrong. When you click on the button image a javascript error popup appears:
An error exists inside your "ontoggle" function:
TypeError: document.getElementById(divobj.id + "_info-toggle") is null
Aborting execution of function.
You can see it in: http://cineout.es/div_test/divs_test2.html
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Apr 30, 2010
I wrote the simple code in javascript but it dosent work its
document.getElementById("Label1").innerText = "Change";
but it gives an error : "'document.getElementById(...)'is null or not an object "
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Feb 24, 2011
I'm getting the following problem. The reason is that the object appears through AJAX. But if I choose it NOT to appear it gives this problem. How can I avoid this? I put an if statement inline
Code:
if(document.getElementById('vsbtitle_1').value!=null){
thisurlext+='&btitle1='+document.getElementById('vsbtitle_1').value;
}
Error: document.getElementById("vsbtitle_1") is null
[Code].....
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Jul 23, 2005
I've got what should be a simple assignment of either an element value
or a default string to a variable, but when the element doesn't exist I
get an "Object required" error rather than an assignment of the default
value.
I originally used the simple statement:
var v = document.getElementById('foo').value ||
parent.document.getElementById('foo').value ||
'unknown'
document.writeln(v);
This caused the "Object required" error if there was no element, so I
added some error checking:
var v = (document.getElementById)
? document.getElementById('foo').value
: (parent.document.getElementById)
? parent.document.getElementById('foo').value
: 'unknown'
document.writeln(v);
Unfortunately, this still results in an "Object required" error when
the element is not present in the document or its parent.
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Jul 23, 2005
Does anyone know why the onclick in the following popup menu gives
the error:"Val is undefined"? Does it have something to do with the
fact that it is called within the variable tablePop? Because it IS
displayed properly as part of the popup text, where it is called
outside the single quotation marks (see [***]). It is only in the
onclick that it's causing problems. Code:
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Jul 20, 2005
Any ideas as to how I can get ride of the script error undefined
variable "Exp_Month"?
I am trying to get this drop down list to default to the current month
as opposed to 01.
Thank you in advance.
<SELECT size="1" name="Exp_Month">
<OPTION value="01" selected>1</OPTION>
<OPTION value="02">2</OPTION>
<OPTION value="03">3</OPTION>
<OPTION value="04">4</OPTION>
<OPTION value="05">5</OPTION>
<OPTION value="06">6</OPTION>
<OPTION value="07">7</OPTION>
<OPTION value="08">8</OPTION>
<OPTION value="09">9</OPTION>
<OPTION value="10">10</OPTION>
<OPTION value="11">11</OPTION>
<OPTION value="12">12</OPTION>
</SELECT>
<script type="text/javascript">
var now = new Date()
Exp_Month.selectedIndex = now.getMonth()
</script>
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Sep 19, 2011
I have problems with js in IE. I have such script:
Code:
After that I have an onclick event:
Code:
commentController is defined in an external file. This works fine in all browsers except IE. In IE I have error 'cl' is undefined.
I tried to connect comment-controller file
Code:
But then I have the same error in firefox too.
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Jul 24, 2011
I am getting a missing variable name error in this line, can someone help me figure what is wrong with it?
Code JavaScript:
var button_remover = '<input type="button" value="X" class="field_remove" onclick="remove_field(' + field_name, + 'this)" /><br/>';
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Jan 17, 2009
I am trying to write a snippet to put in my form and cannot get it to run. I keep getting an undefined error for the variable 'Code' no matter what I do.The goal is present obtain a Time Frame based on an SVCode selected from a group of radio buttons.
<html>
<head>
<script language="text/javascript">[code]...........
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Jul 14, 2011
Whenever I try to compile a script I wrote, I get the error, "class, interface, or enum expected" and it points to a spot in my script that I don't think should create an error. code...
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