Checking That Array Is Null
Jan 18, 2011
I am using the following script on an e-commerce site to ensure that not both drop downs cannot be selected at the same time, as well as ensuring one must be selected at all times.The problem with this code is that not all of my product pages have these 2 drop downs so I wanted to try and add in an if statement saying that if id2=9999 and id3 == null then pop up the error. That didnt work because I don't think it can be equal to null if it does not exist on the page. I tried to assign id3 a value of 99999 so that on pages that it doesnt get reassigned after (i.e pages it does not exist on) it will still be equal to 99999 and pop up the error according to the second if clause.Unfortunately that did not work either. Is there any other way I can do via javascript?
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Jun 18, 2010
I need to check to see if a cookie has been previously created:
var startnum = readCookie('a1');
if (document.cookie.indexOf('a1') == -1){
var startnum = "0";
[code]....
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Aug 10, 2009
im having a little difficulty checking if an XML node has a value, here the code:
var Divs=new Array("artist","bio","img","date","tickets","venue","street","city","country","headliner");
xmlDoc=xmlhttp.responseXML;
for ( nodes in Divs )
[code]....
This always throws up the error: document.getElementById(Divs[nodes]) is null ive tried putting the xmlDoc in a variable then checking if its null but no luck, also tried the same method against "undefined" but no luck either.
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May 24, 2010
<div class="check">
<iframe src=""></iframe>
</div>
[code]....
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Feb 9, 2007
i am declaring an array in javascript
var a = new array();
now before assigning a value to the ith element of this array, i have
to check if some value has already been assigned there. But at the
time of defining array, it gives undefined values to the array. Is
there a way/function, thru which i can find, whether a particular
index value was assigned before or not.
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Aug 3, 2006
I have a single dimension array with the following data stored on it.
a[0] = 1~1~10
a[1] = 1~2~11
a[2] = 1~3~15
a[3] = 1~4~19
a[5] = 1~6~10
Here in my case a[0] and a[5] is duplicate because i am using 1 or 0 for active and deactivate purpose a[4] is deactivate value so we can ignore the 10 in this. so in my case 10 is repeated twice on a[0]and a[5] not a[4], so its duplicate value. can any one help me to solve this.
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Nov 9, 2010
I have a text box and would like to see if the value of the input matches the values defined in a JavaScript array.For example, the JavaScript array will hold five values:
v1 = Tom
v2 = Jerry
v3 = Michael
[code]....
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Feb 19, 2011
outputs lines of text, with two <br> between them. What I want is for if it's the last loop for that only to be one <br> but I can't figure out what that "last loop" code should be.
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Feb 9, 2011
Have a bit of a issue. I need to check that every licensenumber[] text box is filled inIf i try to pass it as a array it does not work.Here is my code
PHP Code:
<script Language="JavaScript">
<!--
[code]....
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Jul 23, 2005
is there a function that get the name of the first input field of the
current form ?
in my example below I want create an array of form field name and in the
onsubmit assign all element's name to create a simple iteration to test if
some elements in my array, that must be required, are null:
something like function verify(array of string)and in onsubmit something
like return onsubmit(field1,field2,field3....) Code:
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Jul 30, 2011
I did find the javascript twice in my code, once in the header and once here, so i removed it from the header. I also changed to src to the full url. But i am still getting this and i dont know why. the file is located in the root directory. found a solution. basically Internet Explorer is crappy and doesnt like the setAttribute property so had to change the onchange handler by directly changing the attrbute for the object like so.object.onchange = function() {}i have no idea what they means, does that mean i need to change swfobject.js or does that mean i have to change my xml request. and if it is the swfobject i have no clue what they mean or what lines
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Feb 3, 2010
I've been trying for hours and I can't figure out why IE6 is throwing an derror on the following line of code.
Code:
var parts = rgbString.match(/^rgb((d+),s*(d+),s*(d+))$/); This is the function:
Code:
function rgbToHex(rgbString)
{
var parts = rgbString.match(/^rgb((d+),s*(d+),s*(d+))$/);[code]....
And this is the error:'null' is null or not an object
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Feb 26, 2009
I put a long script but the problem is small.
var book1 = bobj1.value;
var chapter1 = cobj1.value;
var verse1 = vobj1.value;
var book2 = bobj2.value;
var chapter2 = cobj2.value;
var verse2 = vobj2.value;
[Code].....
I don't know if this is written properly: if(bcv[a]!= ""){ The reason this is happening is because the error shows: Error: cobj1 is null Source File: [URL]
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Jun 20, 2010
My code is in the attachment alex.txt.When i press the button for first time it gives me error: 'null' is null or not an object. But when i press it again or refresh the page and press the button it gives me the result that i expect.When i change the var pdbfile1,2,3 values(for example with 2x4n;3gis;1crn) and press the button again there is the error again and i have to refresh the page again.
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Jan 20, 2010
We are trying to use some javascript for a slideshow and are getting the following error message in our browser.
Unfortunately, we only have basic CSS and HTML knowledge. I was hoping the error might be an easy fix for someone on this forum.
The code is as follows:
What changes need to be made to this code?
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Oct 5, 2010
I'm not to familiar with js but I'm having a problem with, mootools.js in IE 8 "null" is not a null or not an object line 8, 13, 59
Parts of my site are not showing up and this just started happening.
[url]
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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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Sep 10, 2009
$.getJSON('/VersionQueryJsonAction',{verID:verid},function(data){
if data.verMailDate is null,i need it is "",not "null",.
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Jul 23, 2005
How can i check parent's URL from a child (popup) window ? and how can i
refresh it if the URL is say http://www.xxx.com/?
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Jan 9, 2006
I have some javascript that uses setInterval(..) to change the src of
an image every second. Is there any way of programmatically checking to
see whether an image is loaded properly or if a 404 File Not Found
error occurs for it?
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Aug 8, 2006
Does anyone have any coding rules they follow when doing argument checking?
When arguments fail during check, do you return from the call with an ambiguous return value, or do you throw exceptions?
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Jan 4, 2006
I have the following:
<script language="JavaScript">
<!--
window.onload=function (){
var pwinput1 = document.getElementById("tfOtherJobTitle");
pwinput1.onkeyup= function(){
if(this.value = "test"){
document.getElementById("pbRegistration").disabled=false;
}
}
}
</script>
for a button called "pbRegistration" that checks to see if the value of textbox (tfOtherJobTitle) equals "test" and on completion of the typing "test", it enables the button. Why isn't it working?
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May 2, 2006
I have a form that produces a few checkboxes via a server side script. Once on the page, the source looks like this...
<tr>
<td><input type="checkbox" name="access" value="1" checked /></td>
<td><input type="checkbox" name="view" value="1" checked
/></td>
</tr>
<tr>
<td><input type="checkbox" name="access" value="2" checked /></td>
<td><input type="checkbox" name="view" value="2" checked
/></td>
</tr>
...what I'm trying to do is pass through the value of the checkbox
ticked through to a function. This function will then, depending on
whether the box is ticked or not, untick the access# checkbox.
I can pass the number through to my function, but I'm having
difficulty trying to reference the actual checkbox from the script.
This is what I've got so far...
function AM_MenuSelection(opt) {
var myOpt=document.frmNew.view[opt].value;
alert(myOpt);
}
As you can see, I can reference the value of the object, but need to
be able to access the related access# object.
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Sep 27, 2006
I'm trying to run some code when a H2 element is clicked on an unordered list below it. The problem is, the code runs whether the h2 has a ul below it or not.
h[x].onclick = function(){
var ul = this.nextSibling;
while (ul.nodeType != 1){
ul = ul.nextSibling;
}
So, if I have something like this:
<h2>Subtitle</h2>
<h2>Subtitle 2</h2>
<ul><li>List</li></ul>
Clicking "Subtitle" runs the function on "Subtitle 2". I don't want the function to run unless the next element is an ul. How can I verify that the next element is an unordered list and if not, don't run anything?
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Mar 23, 2008
<html>
<head>
<script type="text/javascript">
[code]....
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Aug 3, 2011
I'm using jQuery SVG and would like to check if the browser that the person is using will support SVG --- if not, they'll receive a polite message; is there anyway to check this using javascript?
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