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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>ÎÞ±êÌâÎĵµ </title>
<script language="javascript">
var xmlHttpRequest;
function createXMLHttpRequest()
{

if(window.ActiveXObject)
{
                  return new ActiveXObject("Microsoft.XMLHTTP");
}else
{
    return new XMLHttpRequest();
}
}


function checkUserName(){

createXMLHttpRequest();

        xmlHttpRequest.open("GET","1.aspx",true);
        alert("dddd");
xmlHttpRequest.onreadystatechange=function()
{
  if(xmlHttpRequest.readyState == 4 && xmlHttpRequest.status==200)///status--%>
            alert("·þÎñÆ÷·µ»Ø"+xmlHttpRequest.responseText);
          }
xmlHttpRequest.send(null);
}


</script>
</head>



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if(httpRequest.status==200){
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