i dont know if you already seen that nice exploit but it seems interesting.
this is the code:

<STYLE>@;/*

here a link where i found it:
http://anonym.to/?http://www.ecqurity.com/adv/11.html
it is only 12bytes big
it sounds impossible but it does really work!
if you know,IE has some problems with CSS and that is the reason why you can also attack someone else IE

cYa
CyBeR

It's fine with Firefox

Opera doesn't care either, but nice exploit!