Internet Explorer VS Firefox
I'm a new ASP.NET developer. I've developed a web site an tested it with Explorer and all works fine. After I'll try it with Firefox and nothing run correctly, the graphics and the javascript. Many javascript function works only in IE and not in Firefox for example:
selection.move('character', 1);
selection.expand('character');
doesn't exist in Firefox. There are some documentation where I can see the difference between the 2 or anyone can put some links, example etc. ?
How can I develop a web site indipendent from the browser?
Thanks

