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 setContent() {
			if (document.getElementById) {
				var windowHeight = getWindowHeight();
				if (windowHeight > 0) {
					var contentElement = document.getElementById('pagewrapper');
					var contentHeight = contentElement.offsetHeight;
					if (windowHeight - contentHeight > 0) {
						contentElement.style.position = 'relative';
						contentElement.style.top = ((windowHeight / 2) - (contentHeight / 2)) + 'px';
					}
					else {
						contentElement.style.position = 'static';
					}
				}
			}
		}
		window.onload = function() {
			setContent();
		}
		window.onresize = function() {
			setContent();
}