function ajax(href, div, querystring, LoadingMessage) {
	var xmlHttp;
	try {
		xmlHttp = new XMLHttpRequest();
	} catch (e) {
		try {
			xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	xmlHttp.onreadystatechange = function() {
		if (xmlHttp.readyState == 1) {
			document.getElementById(div).innerHTML = LoadingMessage;
		} else if (xmlHttp.readyState == 4) {
			document.getElementById(div).innerHTML = xmlHttp.responseText;
		}
	}
	var url = "";
	url = href + querystring;
	xmlHttp.open("GET", url);
	xmlHttp.send(null);
}
function checkSizeSelect() {
	var i = document.getElementById("attrib-1");
	if (i.options[i.selectedIndex].value == 0) {
		alert("Please select a size!");
		return false;
	} else
		return true;
}