var xmlHttp;
var type;
var regionid;
var target;

function refreshList(typesource,targetsource,destination) {
	createXMLHttpRequest();
	type = typesource;
	target = targetsource;
	sendurl = destination;
	getSelectedId(type);
	
	if( regionid == "all" ){	
		var select = document.getElementById(target);
		select.options.length = 0;
		var element = document.createElement("option");
		element.setAttribute("value", "all");
		var text = document.createTextNode("All counties");
		element.appendChild(text);
		select.appendChild(element);
		return;
	}

	var url = sendurl + "?ts=" + new Date().getTime();
	var queryStr = "regionid=" + regionid;
	xmlHttp.onreadystatechange=handleStateChange;
	xmlHttp.open("POST", url);
	xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
	xmlHttp.send(queryStr);
}

function handleStateChange() {
	
	if (xmlHttp.readyState == 4) {
		if (xmlHttp.status == 200) {
			updateList();
		}
	}
 }
 function updateList() {
	 //alert("type: " + type);
	
	 var select = document.getElementById(target);
	 select.options.length = 0;
	 //alert(xmlHttp.responseXML.xml);
	 var options = xmlHttp.responseXML.getElementsByTagName("country");
	 for (var i = 0, n = options.length; i < n; i++) {
		 select.appendChild(createElementWithValue(options[i]));
	 }
	 
 }
 function createElementWithValue(text) {
	 var element = document.createElement("option");
	 element.setAttribute("value", text.getAttribute("id"));
	 var text = document.createTextNode(text.firstChild.nodeValue);
	 element.appendChild(text);
	 return element;
 }




function getSelectedId(elementId) {
	 //alert("elementId: " + elementId);
	 //var selectedId = null;
	 var options = document.getElementById(elementId).childNodes;
	 var option = null;
	 for (var i = 0, n = options.length; i < n; i++) {
		 option = options[i];
		 if (option.selected) {
			 regionid = option.value;
		 }
	 }
 }

function createXMLHttpRequest() {
	if(window.XMLHttpRequest) { 
			xmlHttp = new XMLHttpRequest();
		} else if (window.ActiveXObject) { 
			try {
				xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
			} catch (e) {
				try {
					xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
				} catch (e) {
				}
			}
		}
}