cross-browser help

[Phalon]

I want to make web pages that work in all browsers but i don't know what's different between browsers.
Is there somewhere on the web that lists which tags and functions, and anything else. That works on all browsers and what doesn't on specific browsers.

[ray326]

This is probably one of the better places.

http://www.quirksmode.org/

[felgall]

HTML is the same on all browsers provided that you avoid proprietary tags.

Support for CSS1, CSSP, CSS2, and CSS3 varies between browsers. The site Ray mentioned is a good one for checking the differences.

JScript in Internet Explorer and Javascript in other browsers all support the ECMAscript standards. Where they differ is in how much of the DOM3 (final) standard that they support and also the few commands for accessing browser info are completely different for different browsers. Again quirksmode is a good site for more info.