var xmlHttp = createXmlHttprequestObjecta();
function createXmlHttprequestObjecta(){
	var xmlHttp;
	if(window.ActiveXObject){
	try{
	xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");	
	}catch(e){
	xmlHttp = false;
	}
}else{
	try{
	xmlHttp = new XMLHttpRequest();	
	}catch(e){
	xmlHttp = false;	
	}
}
	if(!xmlHttp){
	alert("Error creating the XMLHttpRequest object");	
	}else{
	return xmlHttp;	
	}
}

function startRequest(inputValue){
	if(xmlHttp.readyState==4|| xmlHttp.readyState==0){
	var id = inputValue;
	var url="etc/get_dist.php?id="+id;
	//alert("hello");
	xmlHttp.open("GET",url,true);
	xmlHttp.onreadystatechange = handleServerResponse;
	xmlHttp.send(null);
	}else{
	setTimeout('process(inputValue)',1000);	
	}	
}	    
function handleServerResponse(){
	if(xmlHttp.readyState == 4){
	if(xmlHttp.status == 200){		
	var xmlResponse = xmlHttp.responseXML;
xmlRoot = xmlResponse.documentElement;
zipArray = xmlRoot.getElementsByTagName("chengshi");
distArray=xmlRoot.getElementsByTagName("id");
var html='';
html+="<select name='dist' style='width:100px'>";
html+="<option value='>=1' selected>选择县/区</option>";
	for(var i=0;i<zipArray.length;i++){
	html +="<option value==\""+distArray.item(i).firstChild.data+"\" >"+zipArray.item(i).firstChild.data+"</option>"; 
	}

html+='</select>';
	}
}
document.getElementById("zhongguo").innerHTML=html;
}