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JScript code:

//ÉèXMLHttpRequest±äÁ¿
var XMLHttpReq=false;

//´´½¨Ò»¸öXMLHttpRequest¶ÔÏó
function createXMLHttpRequest(){
if(window.XMLHttpRequest){ //Mozilla
XMLHttpReq=new XMLHttpRequest();
}
else if(window.ActiveXObject){
try{
XMLHttpReq=new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try{
XMLHttpReq=new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){
alert("ÄãµÄä¯ÀÀÆ÷²»Ö§³Öajax!");
return false;
}
}
}
}
//·¢ËÍÇëÇóº¯Êý
function sendURL(url){
createXMLHttpRequest();
XMLHttpReq.open("POST",url,true);
alert(url);
XMLHttpReq.onreadystatechange=parse; //Ö¸¶¨ÏìÓ¦µÄº¯Êý
XMLHttpReq.send(null); //·¢ËÍÇëÇó
}
function parse(){
if(XMLHttpReq.readyState==4){ //¶ÔÏó״̬
if(XMLHttpReq.status==200){//ÐÅÏ¢Òѳɹ¦·µ»Ø£¬¿ªÊ¼´¦ÀíÐÅÏ¢
document.getElementById("status").innerHTML=XMLHttpReq.responseText;
}else{
window.alert("ËùÇëÇóµÄÒ³ÃæÓÐÒì³£");
}
}
}
//Éí·ÝÑéÖ¤
function checkUsername(){
var username = document.getElementById("registerName").value;
alert(username); //ÕâÀïͨ¹ý¼ì²éÄܵõ


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