var xmlHttp;//全局作用域变量   保存对象的引用
	function createXMLHttpRequest(){//创建XMLHttpRequest实例的具体工作
		if(window.ActiveXObject){
		   xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
		}else if(window.XMLHttpRequest){
		   xmlHttp = new XMLHttpRequest();
		}
	}
	function createQueryString(){
		var str=document.getElementById('shengoption').value;
		var queryString="str="+str;
		return queryString;
	}
	function doRequestUsingPost(){
		document.getElementById("tipdi").innerHTML = "[请选择市]";
		document.getElementById("shioption").focus();
		createXMLHttpRequest();
		
		var url = "../../search/shengphp.php";
		var queryString = createQueryString();
		xmlHttp.open("POST",url,true);
		xmlHttp.onreadystatechange = handlestatechange;//POST是先把xmlHttp打开，在调用该事件
		xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
		xmlHttp.send(queryString);
		//alert(queryString);
        //form1.xianoption.value='<option value="0" selected>区县</option></select>';
		//document.getElementById('xianoption').innerHTML= "<select > <option value='0' selected>区县</option> </select>";
//		xianoption=document.getElementById("xianoption");
//		xiangoption=document.getElementById("xiangoption");
//		cunoption=document.getElementById("cunoption");
//		xianoption.options[0] = new Option("区县","");
//		xiangoption.options[0] = new Option("乡镇","");
//		cunoption.options[0] = new Option("村","");

	}
	function handlestatechange(){
		if(xmlHttp.readyState == 4){
		   if(xmlHttp.status == 200){ 
			parseResults();
		   }
		}
	}
	function parseResults(){
		var responseDiv=document.getElementById("serverResponse");
		var responseText = document.createTextNode(xmlHttp.responseText);
		var returnstr=xmlHttp.responseText;
		//alert(returnstr);
		document.getElementById("shi").value=returnstr;
		//alert(returnstr);
		//--------给option赋值---------
		ary_n = new Array(),ary_v = new Array();
		var shi=returnstr.split(",");
		var len=shi.length;
		//alert(len);
		var j =0;
		for(i=0;i<len;i++){
			//alert(shi[i]);
			if(i%2 == 0) ary_n[j]=shi[i];
			else{
				ary_v[j]=shi[i];
				++j;
			}
		}
		var obj=document.getElementById("shioption");
		if(ary_v.length < 1){
			obj.length = 0;
			obj.options[0] = new Option("-请选择-","");
		}else{
			obj.length = ary_v.length;
			for(var i =0;i < ary_v.length;i++){

				obj.options[i] = new Option(ary_v[i],ary_n[i]);
			}
		}
		obj.options[0].selected = true;
		obj.options[0].disabled = true;
	}
	
	//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@--------------------------
	var xmlHttp1;//全局作用域变量   保存对象的引用
	function createXMLHttpRequest1(){//创建XMLHttpRequest实例的具体工作
		if(window.ActiveXObject){
		   xmlHttp1 = new ActiveXObject("Microsoft.XMLHTTP");
		}else if(window.XMLHttpRequest){
		   xmlHttp1 = new XMLHttpRequest();
		}
	}
	function createQueryString1(){
		var str1=document.getElementById('shioption').value;
		var queryString1="str1="+str1;
		return queryString1;
	}
	function doRequestUsingPost1(){
		document.getElementById("tipdi").innerHTML = "[请选择县]";
		document.getElementById("xianoption").focus();
		createXMLHttpRequest1();
		
		var url1 = "../../search/shengphp.php";
		var queryString1 = createQueryString1();
		xmlHttp1.open("POST",url1,true);
		xmlHttp1.onreadystatechange = handlestatechange1;//POST是先把xmlHttp打开，在调用该事件
		xmlHttp1.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
		xmlHttp1.send(queryString1);
	}
	function handlestatechange1(){
		if(xmlHttp1.readyState == 4){
		   if(xmlHttp1.status == 200){ 
			parseResults1();
		   }
		}
	}
	function parseResults1(){
		var responseDiv=document.getElementById("serverResponse");
		var responseText = document.createTextNode(xmlHttp1.responseText);
		var returnstr=xmlHttp1.responseText;
		document.form1.elements["xian"].value=returnstr;
		//alert(returnstr);
		//--------给option赋值---------
		xian_n = new Array(),xian_v = new Array();
		var xian=returnstr.split(",");
		var xian_len=xian.length;
		//alert(xian_len);
		var jj =0;
		for(ii=0;ii<xian_len;ii++){
			//alert(xian[i]);
			if(ii%2 == 0) xian_n[jj]=xian[ii];
			else{
				xian_v[jj]=xian[ii];
				++jj;
			}
		}
		var xianoption=document.getElementById("xianoption");
		if(xian_v.length < 1){
			xianoption.length = 0;
			xianoption.options[0] = new Option("-请选择-","");
		}else{
			xianoption.length = xian_v.length;
			for(var i1 =0;i1 < xian_v.length;i1++) xianoption.options[i1] = new Option(xian_v[i1],xian_n[i1]);
		}
		xianoption.options[0].selected = true;
		xianoption.options[0].disabled = true;
	}
		
	//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@--------------------------
	var xmlHttp2;//全局作用域变量   保存对象的引用
	function createXMLHttpRequest2(){//创建XMLHttpRequest实例的具体工作
		if(window.ActiveXObject){
		   xmlHttp2 = new ActiveXObject("Microsoft.XMLHTTP");
		}else if(window.XMLHttpRequest){
		   xmlHttp2 = new XMLHttpRequest();
		}
	}
	function createQueryString2(){
		var str2=document.getElementById('xianoption').value;
		var queryString2="str2="+str2;
		return queryString2;
	}
	function doRequestUsingPost2(){
		createXMLHttpRequest2();
		
		var url2 = "../../search/shengphp.php";
		var queryString2 = createQueryString2();
		xmlHttp2.open("POST",url2,true);
		xmlHttp2.onreadystatechange = handlestatechange2;//POST是先把xmlHttp打开，在调用该事件
		xmlHttp2.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
		xmlHttp2.send(queryString2);
	}
	function handlestatechange2(){
		if(xmlHttp2.readyState == 4){
		   if(xmlHttp2.status == 200){ 
			parseResults2();
		   }
		}
	}
	function parseResults2(){
		var responseDiv=document.getElementById("serverResponse");
		var responseText = document.createTextNode(xmlHttp2.responseText);
		var returnstr=xmlHttp2.responseText;
		//document.form1.xiang.value=returnstr;
		document.getElementById("xiang").value=returnstr;
		//alert(returnstr2);
		//--------给option赋值---------
		xiang_n = new Array(),xiang_v = new Array();
		var xiang=returnstr.split(",");
		var xiang_len=xiang.length;
		//alert(xiang_len);
		var j2 =0;
		for(i2=0;i2<xiang_len;i2++){
			//alert(xiang[i]);
			if(i2%2 == 0) xiang_n[j2]=xiang[i2];
			else{
				xiang_v[j2]=xiang[i2];
				++j2;
			}
		}
		var xiangoption=document.getElementById("xiangoption");
		if(xiang_v.length < 1){
			xiangoption.length = 0;
			xiangoption.options[0] = new Option("-请选择-","");
		}else{
			xiangoption.length = xiang_v.length;
			for(var ii0 =0;ii0 < xiang_v.length;ii0++) xiangoption.options[ii0] = new Option(xiang_v[ii0],xiang_n[ii0]);
		}
		xiangoption.options[0].selected = true;
		xiangoption.options[0].disabled = true;
	}
	
	//##################################################################################---------------------------
		var xmlHttp3;//全局作用域变量   保存对象的引用
		function createXMLHttpRequest3(){//创建XMLHttpRequest实例的具体工作
			if(window.ActiveXObject){
			   xmlHttp3 = new ActiveXObject("Microsoft.XMLHTTP");
			}else if(window.XMLHttpRequest){
			   xmlHttp3 = new XMLHttpRequest();
			}
		}
		function createQueryString3(){
			var str3=document.getElementById('xiangoption').value;
			//alert(str3);
			var queryString3="str3="+str3;
			return queryString3;
		}
		function doRequestUsingPost3(){
			//document.getElementById("cunoption").style.display="";
			createXMLHttpRequest3();
			
			var url3 = "../../search/shengphp.php";
			var queryString3 = createQueryString3();
			xmlHttp3.open("POST",url3,true);
			xmlHttp3.onreadystatechange = handlestatechange3;//POST是先把xmlHttp打开，在调用该事件
			xmlHttp3.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
			xmlHttp3.send(queryString3);
		}
		function handlestatechange3(){
			//if(xmlHttp3.readyState == 4){
			   ///if(xmlHttp3.status == 200){ 
				parseResults3();
			   //}
			//}
		}
		function parseResults3(){
			var responseDiv=document.getElementById("serverResponse");
			var responseText = document.createTextNode(xmlHttp3.responseText);
			var returnstr=xmlHttp3.responseText;
			document.form1.elements["cun"].value=returnstr;
			//alert(returnstr);
			//--------给option赋值---------
			cun_n = new Array(),cun_v = new Array();
			var cun=returnstr.split(",");
			var cun_len=cun.length;
			alert(cun_len);
			var j3 =0;
			for(i3=0;i3<cun_len;i3++){
				//alert(cun[i3]);
				if(i3%2 == 0) cun_n[j3]=cun[i3];
				else{
					cun_v[j3]=cun[i3];
					++j3;
				}
			}
			var cunoption=document.getElementById("cunoption");
			if(cun_v.length < 1){
				cunoption.length = 0;
				cunoption.options[0] = new Option("-请选择-","");
			}else{
				cunoption.length = cun_v.length;
				for(var ij0 =0;ij0 < cun_v.length;ij0++) cunoption.options[ij0] = new Option(cun_v[ij0],cun_n[ij0]);
			}
			cunoption.options[0].selected = true;
			cunoption.options[0].disabled = true;
		}
		
	//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%---------------------------