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 setFooter() {
			if (document.getElementById) {
				var windowHeight = getWindowHeight();
				if (windowHeight > 0) {
					var contentHeight = document.getElementById('main').offsetHeight;
					var footerElement = document.getElementById('footer');
					if( footerElement != null )
					{
						var headerElement = document.getElementById('hdr').offsetHeight;
						var footerHeight = footerElement.offsetHeight;
						if (windowHeight - (contentHeight + footerHeight + headerElement) >= 0) {
							footerElement.style.position = 'relative';
							footerElement.style.top = (windowHeight - (contentHeight + footerHeight + headerElement )) + 'px';
						}
						else {
							footerElement.style.position = 'static';
						}
					}
				}
			}
		}
		window.onload = function() {
			setFooter();
		}
		window.onresize = function() {
			setFooter();
		}