What you need to know to be compatible with Mozilla. _Basic knowledge

I think I should take this thing out first. I hope it can help everyone. I will write down whatever comes to mind. If there are any omissions, please point them out and I will add them.
Listed more than 20 differences between IE and Mozilla in CSS, DHTML, and JS. You should be able to handle them in general situations.
MozillaVsIE View address: http://www.never-online.net/reference/mozillaVsIe