IE nervt gewaltig. Besonders dann, wenn man CSS oder JavaScript verwenden will. Also eh fast immer.

So klappt's übrigens:

var height = (typeof window.innerHeight != 'undefined' ? window.innerHeight : document.body.offsetHeight);
var width = (typeof window.innerWidth != 'undefined' ? window.innerWidth : document.body.offsetWidth);

alert(width + ", " + height);