Cross-Browser Web Application Testing Made Easy
'Test on multiple browsers' has been a mantra ever since there have been multiple browsers to test on. Testing them all--especially these days--is impossible. But you can come a lot closer than you may think. In this article, learn a variety of techniques for cross-browser testing, from the very thorough to the quick and dirty. The choice you make will depend on your resources, but this is an issue you can't ignore.
Fruhlinger, Joshua A. IBM (2007). Articles>Web Design>Programming>Testing