What steps would you take to make an already finished Layout browser compatible

I know there are a few questions out there regarding what to do to create a website from scratch having browser compatibility in mind,... but what about a finished website? I've been given a website that somebody else designed and it looks sweet in Firefox, but it's awful in any other browser,... everything is all over the place (Yeah, my skills to describe tec开发者_StackOverflow社区hnical problems are amazing), collapsed divs everywhere! That's the biggest issue here, I guess if I can solve that bit I could figure the rest out from that point on.

Any help greatly appreciated!

Since you really haven't given any specifics that can be addressed, I would just state that I don't see any shortcut to resolving this.

Ideally, you'll be able to go through and make a list of those techniques that are not compatible with other browsers. If that will be too much work then you are sort of looking at a rewrite.

And this, of course, is the reasons why website developers should be testing on all major browsers as the site is developed.