Why this simple script is not working. Trying to use getElementById() but Firebug says the ID is null. I've tried troubleshooting by accessing other ID's but they all come back 'null'. Trying to add 2 classes based on an ID:
<script>
pageId = 1;
if(pageId == 1) {
//alert('This is page' + pageId);
document.getElementById('arta').setAttribute("class", "menu-on menu-a");
}
<./script>
An online example is here: [URL]. I also tried accessing the id like below but got the same result:
document.arta.setAttribute('class', 'menu-on menu-a');
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.
Basically i'm trying to draw a box over an image which is turning out to be a nightmare. The problem i'm getting at the moment is that i'm creating a line with <div which works when it's not hidden but I need to be able to make it hidden so I can use layers to show all when it finished drawing to make it smoother. This is how some other scripts are doing it that i've seen. So i've got it drawing a line and I need getElementById to pick out the layer but it's only picking out NULL with the one i've got enabled below. I've tried the others but they just come out as errors. I need to get top2 which is the <div line to show itself but I can't seem to reference it by getElementById. I use linux mozilla so i need it working in mozilla as well as windows that's why i'm using getElementById. My code is below any ideas anyone?
Suppose I have the following inside a function:Code JavaScript:document.getElementById('display_content').innerHTML = "hello";The above works.However, when I define it like the following it says display_content is null on firefox error console.
Code JavaScript: var display_content = document.getElementById('display_content');
This function was working in Safari but not in Firefox. I was referencing a couple of elements using the forms[] array instead of getElementById(). I changed those refernces to use getElementById() and now the calculateTotals function does not work in Safari or Firefox.
So I did an alert box to see ucell and it was null. I tried two more alert boxes for the id I was passing to getElementById and for the id of the actual element on the page (which was also created dynamically). They were both identical. The element is created in the onload event, and I am not calling the calculateTotals function until there is onchange event on a text box. So it is not that the element has not been created yet. . Code:
For some reason getElementById continues to tell me that it had grabbed a null value despite any value I input. I am using firefox 3.6.8. Am I doing something wrong here?
This seemed like it should be so simple. It works fine in Firefox, but not in IE. The goal is to disable the form's Submit button, until the question is answered. (The alert is for troubleshooting.)
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
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
I have a html file and a separate javascript file.
The html file contains: <input type="reset" id = "resetButton" />
I want a message to pop up if the reset button is pressed.
So in the js file I have: document.getElementById("resetButton").onclick = doAlert;
doAlert is a function that simply does: alert("Do you want to reset?");
I know my separate js file is linked correctly because if I just put in alert("hello"); in the js file then it works. But if I use the document.getElementById thing in the js file, then there is an error. The error, according to the error console, says that "resetButton" is null.
I have some javascript to test for screen resolution and if it's of size x it loads one flash file and if it's larger it loads a different flash file. The code is not in a function so it should run when the page loads. The test for screen resolution is working but firefox error console says document.getElementById("embed1") is null.I thought it might just not agree with my using innerHTML to add a flash file but when I just did
Code: window.alert(document.getElementById("embed1").innerHTML); it still had the same error.
does javascript outside of a function run before some elements are loaded? I see no reason for this error.
Code: <script type="text/JavaScript"> var screenwidth = screen.width; if (screenwidth <= 1024) {[code].....
Is there a way for getElementById to perform a function if it finds an ID that is like something - sort of like a wildcard? I want the function to run if the ID contains "_price". It will have something like 247_price or 23_price. I want to ignore the first number and only concern myself with whether or not it has "_price" in it.
Code: if (document.getElementById("LIKE_price")) { //do this } else { //do this }
I've got the following code on one of my pages, it works fine in IE6 and Netscape 6.2, but when you get around to using it on Netscape Navigator 4.08 it doesn't work, instead giving me a "document.getElementByID is not a function" error. Here's the code it has a problem with...
function CrseDets(IDS) { window.open('coursedetails.asp?whereby=' + document.getElementById(IDS).value,null,'top=0,left=0,width=672,height=500, background="gfx/backgrd.gif", scrollbars=yes'); }
I am trying to pass a variable into document.getElementById and it is returning a null value. I am hoping someone can identify my error and point it out. The frustrating thing is, I got it to work and then changed the code and screwed it up again...ugh. Anyways, here is the HTML side of it (an onclick event in a button, calling a function with these arguments):
FireBug shows the problem is with the first line of the function - it's assigning myDiv null instead of what I want it to assign it (div#myDiv1 I think).
In the Javascript I have Written one Function in that function I have to call another function click() It is not working in mozilla.. The code I have written: document.getElementById('Someid').click();
function getParentElementByTagName(child, TagName){ var cn; if (child.parentElement){ cn = child.parentElement; if (child.parentElement.tagName == TagName){ return cn; }else{ getParentElementByTagName(child.parentElement, TagName); }}}
although it finds the element, the function returns null ( on the line 'return cn', cn is not null though). Is my algorithm wrong ?
I want after send a comment, that message submit online and insert to database, Without Refresh Page. In this code, $.ajax function worked , but success: function(html) does not work(document.getElementById). I do not know why it does not work!? What do I do?
Here's the problem: I have several hidden divs containing information. When you click on a link, javascript executes which is supposed to move the appropriate info from one of the hidden divs into the visible 'body' div. The javascript isn't working, though, and I'm getting 'undefined' instead
I have a choice of three market items and I want the value of the selected one to be sent to my form. My code is:[code]I have tried giving them different ids, I have tried replacing the id with checked="id='myitem'", I have tried getElementById('myitem.checked'), I have tried getElementbyName.In my full page I have far more radio buttons, so I don't want to do a getElementById('myitem[0].checked || myitem[1].checked etc.But I have run out of alternatives to try. Needless to say as it currently stands it gives the last radio button's value, which means it doesn't like them having the same id, but when I tried changing how the id was applied, or called - ElementByName, FF gives the error message as id is null.
I'm using JSON/jQuery to pre populate a drop down menu. What I want to do, is once I select a plan from the drop down menu and click submit (go button), to get the details about the plan. The drop down menu get's pre populated, but I don't get anything after clicking go. I check the functions and it seems that in the DoPlanSearch() I get the alerts showing the newly constructed URL that gets me the correct JSON. But not sure what happens once the data is processed after that. I say this, because my alert statement in the DoPlanSearchCompleted(data) gets me NULL data.
I'm just getting started with this, I'm not exactly sure what's the best approach. Also, I'm not sure the way .JSON files is setup here works, it does on my Dev server though. Code has line: function DoPlanSearchCompleted(data) It should read function UserPlanSearchCompleted(data). The same problem though exists.
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)
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>
