Following examples illustrate the different ways to get height and width of different browser.

For Non-IE:

var Width;

var Height;

Width = window.innerWidth;

Height = window.innerHeight;

For IE 6+ in standards compliant mode :

Width = document.documentElement.clientWidth;

Height = document.documentElement.clientHeight;

For IE 4 compatible:

Width = document.body.clientWidth;

Height = document.body.clientHeight;