Citácia:
IE7 is a JavaScript library to make Microsoft Internet Explorer behave like a standards-compliant browser. It fixes many HTML and CSS issues and makes transparent PNG work correctly under IE5 and IE6.
to znamena, ze ie6 sa sprava ako normalny browser, podporuje priehladne pngcka, hover aj na ine elementy ako a, a myslim, ze taktiez aj pristup k elementom pomocou element[atribut=value]