function getWindowHeight() {
			var windowHeight = 0;
			if (typeof(window.innerHeight) == 'number') {
				windowHeight = window.innerHeight;
			}
			else {
				if (document.documentElement && document.documentElement.clientHeight) {
					windowHeight = document.documentElement.clientHeight;
				}
				else {
					if (document.body && document.body.clientHeight) {
						windowHeight = document.body.clientHeight;
					}
				}
			}
			return windowHeight;
		}
		
	function CenterDiv(){
		var contentElement 	= document.getElementById('home');
		var divHeight		= contentElement.offsetHeight;
		var winHeight 		= getWindowHeight();
		var newTopMargin	= ( winHeight - divHeight ) / 2;
		
		contentElement.style.marginTop = newTopMargin + 'px';
		
	}
	
	window.onload = function() {
		CenterDiv();
	}
	window.onresize = function() {
		CenterDiv();
	}