//var ab = new Array(); 
var xmlHttp; 
var xmlHttpa; 
function createXMLHttpRequest() { 
if (window.ActiveXObject) { 
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
} 
else if (window.XMLHttpRequest) { 
xmlHttp = new XMLHttpRequest(); 
} 
} 
function createXMLHttpRequesta() { 
if (window.ActiveXObject) { 
xmlHttpa = new ActiveXObject("Microsoft.XMLHTTP"); 
} 
else if (window.XMLHttpRequest) { 
xmlHttpa = new XMLHttpRequest(); 
} 
} 
function startRequest() { 
createXMLHttpRequest(); 
createXMLHttpRequesta(); 
xmlHttp.onreadystatechange = handleStateChange; 
xmlHttpa.onreadystatechange = handleStateChangearea; 
document.getElementById('select2').options.length = 0; 
document.getElementById('select3').options.length = 0; 
var url = document.UserReg.select1.value; 
var qurl = "/regions.php?province="+url+"&time="+new Date().getTime(); 
xmlHttp.open("GET", qurl, true); 
xmlHttp.send(null); 
//setTimeout("startRequest()",2000); 
} 
function handleStateChange() { 
if(xmlHttp.readyState == 4) { 
if(xmlHttp.status == 200) { 
var obj = document.getElementById('select2'); //将服务器返回的字符串写到页面中ID为select2的区域 
obja = document.getElementById('select3'); //将服务器返回的字符串写到页面中ID为select3的区域 
eval(xmlHttp.responseText); 
} 
} 
} 
function handleStateChangearea() { 
eval(xmlHttpa.responseText); 
} 
//var ab = new Array(); 
function startRequesta() { 
createXMLHttpRequesta(); 
xmlHttpa.onreadystatechange = handleStateChangea; 
document.getElementById('select3').options.length = 0; 
var url = document.UserReg.select2.value; 
var qurl = "/regions.php?city="+url+"&time="+new Date().getTime(); 
xmlHttpa.open("GET", qurl, true); 
xmlHttpa.send(null); 
//setTimeout("startRequest()",2000); 
} 
function handleStateChangea() { 
if(xmlHttpa.readyState == 4) { 
if(xmlHttpa.status == 200) { 
var obja = document.getElementById('select3'); 
eval(xmlHttpa.responseText); 
//将服务器返回的字符串写到页面中ID为select3的区域 
} 
} 
}