function AjaxCity(parentid,cstr)
{
var url = '/city.aspx';
var pars = 'parentid=' + parentid;
var myAjax = new Ajax.Request( url, { method: 'post', parameters: pars,onComplete:showResponseCity.bind(cstr)});
$(cstr).length=0;
} 
function showResponseCity(cstr,sss) 
{ //put returned XML in the textarea
	var a = this;
	var node = cstr.responseXML.getElementsByTagName("City");
	//alert(node.length);
	var b = new Array();
		b[0] = "city"
		b[1] = "area"
		b[2] = "cbd"
	try{
		$(a.toString()).add(new Option("ΛωΣΠ","-1"));
		for(var i=0;i<node.length;i++){
				$(a.toString()).add(new Option(formatTextText(node.item(i)),formatTextValue(node.item(i))));
									}
		for(i=0;i<b.length-1;i++){
			if(a.toString() == b[i]){
										AjaxCity(formatTextValue(node.item(0)),b[i+1]);
										break;
									}
								}
		}
	catch(e){
		alert("ΤέΞ΄ΏͺΝ¨£‘");
	}
 }