How to insert content of a html file into a DIV?

[kenny bones]

Hello, I'm new here and I'm troubling with something.
I'm working on a website which have a treemenu. I've gotten the menu to work alright but I want the DIV which contains the treemenu to have a javascript/ajax which inserts the content of another html file into it. So I don't have to manually edit the code for the menu for each document.

I've put up an Abyss webserver locally here to avoid any issues with the Ajax code.

I've tried using the code found here:
http://www.dhtmlgoodies.com/index.ht...al=ajax-basics

And I basically get an error:

Line: 41
Char: 1
Error: 'document.getElementById(...)'is null or not an object
Code: 0
URL: http://127.0.0.1/mainpage.htm

I just cannot figure out what's wrong here. It looks like it can't find the DIV i've selected. But it's there! The html code for calling the content is this:

<SCRIPT type="text/javascript">
ajax_loadContent('dtree','leftmen1.html'); 
</SCRIPT> 

Meaning it should get the content from leftmen1.html and put it in the DIV called "dtree"

Anyone?

Edit: I know that it can in fact find the leftmen1.html, cause if I change this to something else (a html file that doesn't excist) then I get no error. And of course no content in the DIV.

I've also tried using the code found here:

http://www.dynamicdrive.com/dynamici...jaxcontent.htm

And with the exact same result..

[acoder]

Can you post your code? What do you have on line 41?

[kenny bones]

Hi, I decided to go with ASP insted and just use the "include" function to do this. Works like a charm. Although, now I'm having some other problems with the other menu to get the "onstate" of the buttons to understand which site is open so that the tabs will look right.

http://www.thescripts.com/forum/thread748489.html

Help?