Anyway, enough anger.
This is the page: http://www.marcusl.com/testing/search2.php
Open it in IE and you'll see what it's meant to look like. (The alert box is displaying which tabs were hidden 1-4)
Then open it in FF and you'll see what doesn't work. Most of it; and for some reason when you refresh the page the side bar on the left goes weird, use the address bar again and it works. I guess that's just another of FF's quirks.
Despite this, I need the page to work in firefox just as well as it does in IE. One thing that I noticed first was the alignment of the divs, but I solved that using tables (how web 1.0 of me
I've tried a few things and none of them seem to solve the whole problem, they do one tiny bit and then mess something else up. I put the page through the W3C validator tidy app and it gave me a page which would be impossible to edit due to overlapping styles and incomprehensible code.
What happened to keeping things simple
As always; any help is greatly appreciated
Sorry firefox users