function windowHeight() {
		    var height = 0;
		    
		    if( typeof( window.innerHeight ) == 'number' ) 
		    {
				//Non-IE
				height = window.innerHeight;
		    } 
		    else if( document.documentElement && document.documentElement.clientHeight ) 
		    {
				//IE 6+ in 'standards compliant mode'
				height = document.documentElement.clientHeight;
		    } 
		    else if( document.body && document.body.clientHeight ) 
		    {
				//IE 4 compatible
				height = document.body.clientHeight;                                                                                                                   
			}
		    return height;
		}