using browsers other than internet explorer Options

[dromero986]

ok, presonally, i prefer using opera 7.5 but i know the majority of people use internet explorer
but the problem is, not the same scripts work for both browsers. like i just finished making my friend a xanga...but i used IE to view it since i knew most people used that. i had to you know, move the blog around...which i know how to do perfectly well using scripts for IE. and it looks totally fine in IE, but if i view it in my preferred browser, opera, well...the blog appears to be off the white space i allocated for it. (if you still dont understand what i mean by moving the blog, check out [2]nekked's xanga).
so i was wondering if anyone knew a script supported by ALL browsers, or at least those supported by IE AND opera.