var http_request = false;
	var start = false;
	var catlist = document.vehicles.cat;
	var typelist = document.vehicles.type; 


/*
	function makeRequest(type) {

		http_request = false;

		if (window.XMLHttpRequest) { // Mozilla, Safari,...
			http_request = new XMLHttpRequest();
			if (http_request.overrideMimeType) {
				http_request.overrideMimeType('text/xml');
				// See note below about this line
			}
		} else if (window.ActiveXObject) { // IE
			try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					http_request = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {}
			}
		}

		if (!http_request) {
			alert('Cannot create an XMLHTTP instance');
			return false;
		}
		if (type=='brand')  {
			http_request.onreadystatechange = getCategories;
			var query = 'brand='+escape(document.vehicles.veh.value);
		}
		if (type=='cat') {
			http_request.onreadystatechange = getTypes;
			var query = 'cat='+escape(document.vehicles.cat.value)+'&veh='+escape(document.vehicles.veh.value);
		}
		http_request.open('GET','{/literal}{$xcart_web_dir}/include/vehicles_xml.php{literal}?'+query, true);
		http_request.send(null);
	}
*/

	function makeRequest(type) {

		http_request = false;

		if (window.XMLHttpRequest) { // Mozilla, Safari,...
			http_request = new XMLHttpRequest();
			if (http_request.overrideMimeType) {
				http_request.overrideMimeType('text/xml');
				// See note below about this line
			}
		} else if (window.ActiveXObject) { // IE
			try {
				http_request = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					http_request = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {}
			}
		}

		if (!http_request) {
			alert('Cannot create an XMLHTTP instance');
			return false;
		}
		if (type=='brand')  {
			catlist.options[0] = new Option("Loading ...",0); 
			catlist.options[0].selected = true;

//			'/include/vehicles_xml.php?brand='+escape(document.vehicles.veh.value);
//			getCategories();
			http_request.onreadystatechange = getCategories;
			var query = 'brand='+escape(document.vehicles.veh.value);
		}
		if (type=='cat') {
			typelist.options[0] = new Option("Loading ...",0); 
			typelist.options[0].selected = true;

			http_request.onreadystatechange = getTypes;
			var query = 'cat='+escape(document.vehicles.cat.value)+'&veh='+encodeURIComponent(document.vehicles.veh.value);
		}
		http_request.open('GET','/store/include/vehicles_xml.php?'+query, true);
		http_request.send(null);
	}

	function getTypes() {
		var data = new String();
		if (http_request.readyState == 4) {
			if (http_request.status == 200) {
				var xmldoc = http_request.responseXML;
				var root_nodes = xmldoc.getElementsByTagName('type');
				typelist.options.length=0; 
				typelist.options[typelist.options.length] = new Option("Select Type",0); 
				for (i=0; i<root_nodes.length; i++) {
					data = root_nodes[i].firstChild.data;
					typelist.options[typelist.options.length] = new Option(data,data); 
				}
			} else {
				alert('There was a problem with the request.');
			}
		}

	}