Checking XML Node For Null Or Undefined?
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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Mar 12, 2011
I'm attempting to run some checks on an input value. Initial HTML:
HTML Code:
<div id="sdvcontainer" class="sdvcontainer hidden inline marginleft20">
<input type="text" id="samedatevalue" value="date of event" name="samedatevalue" class="input jdpicker" onKeyDown="javascript:return dFilter(event.keyCode, this, '##/##/####');" />
</div>
After the page loads a javascript calendar function called JDPicker runs and changes it to:
HTML Code:
<div id="sdvcontainer" class="sdvcontainer hidden inline marginleft20">
<div class="jdpicker_w" onClick="checkDate(this);" onkeyup="checkDate(this);">
<input type="text" id="samedatevalue" value="date of event" name="samedatevalue" class="input jdpicker" onKeyDown="javascript:return dFilter(event.keyCode, this, '##/##/####');" />
</div></div>
My issue only occurs on this HTML that is hard coded into the page. I have several other inputs (same element structure with the divs, etc) added later with javascript using createElement functions and my javascript works fine on those:
HTML Code:
function checkDate(field) {
var divfield = field;
cleanWhitespace(divfield);
var date = divfield.childNodes[0];
var msgcontructor=divfield.parentNode;
msgcontructor = msgcontructor.id;
msgcontructor=msgcontructor+"DMsg";
$(document).ready(function(){ .....
My problem is only in IE (testing with v 8). When I try to get the child elements value it gives me this error: "value null or is not an object". I tried using .nodeValue after that and it worked, but then started giving me errors regarding the .length function "length null or is not an object". There is no nodeLength function that I'm aware of.
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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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May 8, 2011
I have built a webshop system in JavaScript(school project)and if I run it , it refuses to work in chrome or internet explorer . In Firefox it works but I get node is null errors on line 343 . But I don't know why
My code:
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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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May 24, 2010
<div class="check">
<iframe src=""></iframe>
</div>
[code]....
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Jul 18, 2007
Its an AJAX script which create mulitple choice dropdown boxes connected to a database. the Javascript works great on both FF and IE. However, in IE i get the irritating error code:
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Jul 21, 2010
I am trying to track down why this custom validator is failing with an error that args is undefined. There are two funnctions - one works and one does not.the bold italicized item is where the error is being generated.Function validHygieneNote works as expected however.
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Mar 1, 2011
I have a bug that is only seeming to effect IE 8.Also has a weird display issue in IE8, but not in "compatibility view", which the bug may fix. Works and looks beautiful is Safari and Firefox.
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Dec 13, 2011
What I am wanting to do is have my form open up a new part of the form when the previous sections are filled out. i.e name field shows, when it has content, the next field opens up for it to be filled out, and so on.
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Jan 24, 2011
I have a bunch of code:
The problem is that when I try to display the rootElement Node Name, it appears as 'undefined' on my browser. I also tried xmlDoc.documentElement.NodeName.
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Aug 21, 2009
Whenever i try to use this function it gives me either -NaN, or undefinedwhat am i doing wrong? The objective of these functions are to change x and y coordinates into SAN (Simplified Algebraic Notation) for use in the Chess Game's DataFile (PGN file format).Live Running DHTML App:http://daomingjin.googlepages.com/ChessManager.html140kb Zip-Archive:http://daomingjin.googlepages.com/ScoreMatev1.ziphere are the functions in Question:
function XCoordToSAN(x)
{
// Convert the x coordinate of the piece to partial SAN (Simplified Algebraic Notation)
[code]....
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Jan 12, 2010
I started getting a wierd problem with my jscript program. Here im using jscript for client-side validation and upon email field submission,im getting undefined value with an error saying "length is null or not an object". All the values of fields prior to that are being obtained properly.
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Nov 14, 2011
I'm getting an error message that says that my function is null or undefined. I figure it' something simple, like maybe a ( instead of {, but I can't seem to find it.
Here's the script from the header:
Code:
<script type="text/javascript">
var time = new Date();
var dayNight = time.getHours();
function displayImage() {
if (dayNight >= 9 && dayNight <= 14) { .....
And from the body:
Code:
<body onload="displayImage()">
<div>
<img id="highlights" src="" alt=""/>
</div>
</body>
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Oct 25, 2011
I am asking jQuery to tell me which drop down option is selected in a drop down list - like this:
I would like to check if this was successful before I proceed. What are the possible return values for this statement?
If no id exists.
If no option is selected.
If some other problem occurred.
In these cases am I expecting a null return; an undefined return, a false return value?
And, based upon the complete set of return possibilities, what would be the best and most comprehensive tests I could apply to cover every base.
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Oct 15, 2009
I have come across an issue that only happens with IE.I have a custom save function that is designed to handle different ajax submits but I will simplify it for debugging. The issue is that once I make a submit everthing is fine at first. Then once I try to submit a second time it craps out. I am checking to see if there is an onsubmit function and then executing it like so before continuing. After the inital submit it is no longer found. When I alert the typeof document on the form it returns object but when I add the onsubmit it says object expected or object is null or undefined.
Code:
function secureBarSubmit(formId)
{
alert(typeof document.getElementById(formId)); // object always
alert(typeof document.getElementById(formId).onsubmit); // func first time then it is broken
[code]...
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Jul 23, 2005
Has anybody seen a function which checked if one of passed elements is
nested in the node of another element passed to function, no matter how deep
it is nested ?
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Mar 31, 2010
I would like to ask your help regarding this damned error message that comes out only in Internet Explorer and makes impossible to submit the form.
The javascript code is:
function checkForm() {
var cname,
[code]....
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Mar 31, 2010
I would like to ask your help regarding this damned error message that comes out only in Internet Explorer and makes impossible to submit the form.The javascript code is:
// JavaScript Document
function checkForm() {
var cname,
[code]...
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Dec 7, 2011
I have a small question. I am building an AJAX-based content editor and in one portion the following xml tag needs to be processed:<
[Code]...
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Nov 23, 2009
I'm using jsTree-0.9.9a. As a test this is the code i'm using to display the ID
oncreate: function(NODE, REF_NODE, TYPE, TREE_OBJ, RB)
{
if (TYPE === "inside") {
parent_id = $(REF_NODE).attr('id');
alert(parent_id)
}}
This works fine when the parent has no child nodes, however, when a child node exists nothing is returned.
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Jul 30, 2011
I did find the javascript twice in my code, once in the header and once here, so i removed it from the header. I also changed to src to the full url. But i am still getting this and i dont know why. the file is located in the root directory. found a solution. basically Internet Explorer is crappy and doesnt like the setAttribute property so had to change the onchange handler by directly changing the attrbute for the object like so.object.onchange = function() {}i have no idea what they means, does that mean i need to change swfobject.js or does that mean i have to change my xml request. and if it is the swfobject i have no clue what they mean or what lines
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Feb 3, 2010
I've been trying for hours and I can't figure out why IE6 is throwing an derror on the following line of code.
Code:
var parts = rgbString.match(/^rgb((d+),s*(d+),s*(d+))$/); 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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