var http_request1 = false;
function send_city_request(url,method) {//初始化、指定处理函数、发送请求的函数
	http_request1 = false;
	//开始初始化XMLHttpRequest对象
	if(window.XMLHttpRequest) { //Mozilla 浏览器
		http_request1 = new XMLHttpRequest();
		if (http_request1.overrideMimeType) {//设置MiME类别
			http_request1.overrideMimeType('text/xml');
		}
	}
	else if (window.ActiveXObject) { // IE浏览器
		try {
			http_request1 = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request1 = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request1) { // 异常，创建对象实例失败
		window.alert("不能创建XMLHttpRequest对象实例.");
		return false;
	}
//	switch(method){
//		case 1: http_request1.onreadystatechange = processRequest1;break;//选择操作函数
//		case 2: http_request1.onreadystatechange = processRequest2;break;
//		case 3: http_request1.onreadystatechange = processRequest20;break;
//	}
	// 确定发送请求的方式和URL以及是否同步执行下段代码
	http_request1.open("GET", url, false);
	http_request1.send(null);
	var result = http_request1.status;
	if(result==200)
    {
		if(method==1){
			var responseText = http_request1.responseText;
		    responseText = trim(responseText);
			//alert(responseText);
			var optGroup = responseText.split("|");
			addOptionGroup1("province",optGroup[0],optGroup[1]);
		}
		if(method==2){
			var responseText = http_request1.responseText;
			responseText = trim(responseText);
			//alert(responseText);
			var optGroup = responseText.split("|");
			addOptionGroup1("city",optGroup[0],optGroup[1]);
		}
		if(method==3)
		{
			var responseText = http_request1.responseText;
			responseText = trim(responseText);
			//alert(responseText);
			var optGroup = responseText.split("|");
			addOptionGroup1("county",optGroup[0],optGroup[1]);
		}
        //alert(http_type_request.responseText);
    }
    http_request1 = null;
}
// 处理返回信息的函数
//function processRequest1() {//操作函数1,调入大类
//	if (http_request1.readyState == 4) { // 判断对象状态
//		if (http_request1.status == 200) { // 信息已经成功返回，开始处理信息
//		    var responseText = http_request1.responseText;
//		    responseText = trim(responseText);
//			//alert(responseText);
//			var optGroup = responseText.split("|");
//			addOptionGroup1("province",optGroup[0],optGroup[1]);
//		} else { //页面不正常
//			alert("您所请求的页面有异常。");
//		}
//	}
//}
//
//function processRequest2() {//操作函数2,调入小分类
//	if (http_request1.readyState == 4) { // 判断对象状态
//		if (http_request1.status == 200) { // 信息已经成功返回，开始处理信息
//			var responseText = http_request1.responseText;
//			responseText = trim(responseText);
//			//alert(responseText);
//			var optGroup = responseText.split("|");
//			addOptionGroup1("city",optGroup[0],optGroup[1]);
//		} else { //页面不正常
//			alert("您所请求的页面有异常。");
//		}
//	}
//}
//function processRequest20() {//操作函数2,调入小分类
//	if (http_request1.readyState == 4) { // 判断对象状态
//		if (http_request1.status == 200) { // 信息已经成功返回，开始处理信息
//			var responseText = http_request1.responseText;
//			responseText = trim(responseText);
//			//alert(responseText);
//			var optGroup = responseText.split("|");
//			addOptionGroup1("county",optGroup[0],optGroup[1]);
//		} else { //页面不正常
//			alert("您所请求的页面有异常。");
//		}
//	}
//}
function loadProvince() {//载入省
	//alert('ddd');
	send_city_request("../web-inf/lib/core/apprun/yellowpages/yellowpages_city.php?type=province",1);//服务端处理程序,操作函数    
//send_request("/classAjaxServer.php?type=parentClass",1);//服务端
}
function loadCity() {//载入市
	send_city_request("../web-inf/lib/core/apprun/yellowpages/yellowpages_city.php?type=city&id="+document.getElementById("province").value,2);
}
function loadCounty() {//载入县
	send_city_request("../web-inf/lib/core/apprun/yellowpages/yellowpages_city.php?type=county&id="+document.getElementById("city").value,3);
}
function addOption1(objSelectNow,txt,val)
{
	/// 使用W3C标准语法为SELECT添加Option
	var objOption = document.createElement("OPTION");
	objOption.text= txt;
	objOption.value=val;
	objSelectNow.options.add(objOption);
}
function addOptionGroup1(selectId,value,name)
{
	var value = value.split(",");
	var name = name.split(",");
	var objSelect = document.getElementsByTagName("SELECT");
	var objSelectNow = objSelect[selectId];
	objSelectNow.length = 1;
	/// 成组添加Options
	for (i=0; i<value.length; i++)
	{
		addOption1(objSelectNow, name[i], value[i]);
	}
}