I am working on a project to convert a web site that is fully functional in Internet Explorer 8 and lower, but does not work well in Firefox or Safari.

A lot of what will need to be changed is going to be javascript-related (aka methods that exist in IE but not in other browsers).

What I want to know is whether anyone is aware of a fairly comprehensive list of common things that have to be changed to work accross all browsers.

I am starting with quirksmode.org but I don't think it will have quite everything I'm looking for. If anyone knows of a list please let me know.