var isIE5=navigator.userAgent.toUpperCase().indexOf("MSIE 5")!=-1;
	var targetElementID="footer-back", targetElementStyleOffset=0
	function adjustHeight() {
	  if (document.getElementById) {
		var targetElement=document.getElementById(targetElementID),
			documentHeight, totalOffset;

		if (targetElement && document.documentElement.offsetHeight
			&& targetElement.offsetHeight && targetElement.offsetTop) {
		  documentHeight=(window.innerHeight);
		  if (targetElement.offsetHeight<documentHeight-targetElement.offsetTop) {
			if (isIE5)
			  totalOffset=targetElement.offsetTop;
			  else totalOffset=targetElement.offsetTop+targetElementStyleOffset;
			targetElement.style.height=String(documentHeight-totalOffset)+'px';
		  }
		}
	  }
	}
	window.onresize=adjustHeight;
	window.onload=adjustHeight;