page margin glitch with Switch Content code in Firefox for microsoft

[wordsistr]

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

This script is lovely in Explorer, but in my Firefox, as soon as the contents of an expanded area exceeds 10 lines, the whole webpage shifts a few pixels to the left and then shifts back when it's collapsed and a different heading is selected

Here it is working well: menu

Here it is with more than 10 lines in the heading entitled Archive: menu2

I realize this is probably more of a Firefox question, but if anyone could suggest a fix I would be immensely grateful!!

[jscheuer1]

Not happening here in FF1.0.6 under Windows XP.

[wordsistr]

Yes I've noticed that it's not very consistent anymore...It seems like javascripts are the first to go buggy if there's some unrelated error in the page's code, which is what I've begun to assume. I noticed that I don't have a doctype at the top of my page anymore...do you think this might be a cause for trouble?