function getElementHeight() {
	    var Elem = "wrapper";
		if(document.getElementById) {
			var elem = document.getElementById(Elem);
		} else if (document.all){
			var elem = document.all[Elem];
		}
		wrapperHeight = elem.offsetHeight;
		//alert('wrapper = ' + wrapperHeight);
			
		var footer = document.getElementById("footer");
		footer.style.top = wrapperHeight+130+'px'; 
		var categoryMenu = document.getElementById("categoryMenu");
		categoryMenu.style.height = wrapperHeight+'px'; 
}