急急急 ！！！！AJAX 在Chrome浏览器中没反应怎么办 ？？？
不要复制百度的 都说在服务端调用 关键是在服务端怎么调用
我页面的代码：
  <script type="text/javascript">
  function huoqu(){
  var obj=Test.sayHello('World!')
var s = document.getElementById("guojia");
var gid = s[s.selectedIndex].value;
var activeX = new ActiveXObject("Microsoft.XMLHTTP");
activeX.open("get","change.action?gid="+gid,true);
activeX.onreadystatechange=function (){
if (activeX.readyState == 4){
document.getElementById("chengshi").innerHTML=activeX.responseText;
}
}
activeX.send();
}

</script>
在IE上面都是好使的 在Chrome中怎么办  
在我代码基础上怎么改  
各位大侠请指教 最好能用代码说明下 


------解决方案--------------------

HTML code

<script type="text/javascript">
  function huoqu(){
  var obj=Test.sayHello('World!')
var s = document.getElementById("guojia");
var gid = s[s.selectedIndex].value;


 if(window.XMLHttpRequest){
    var activeX = new XMLHttpRequest();
}else if(window.ActiveXObject){
    var activeX = new ActiveXObject("Microsoft.XMLHTTP");
}

activeX.open("get","change.action?gid="+gid,true);
activeX.onreadystatechange=function (){
if (activeX.readyState == 4){
document.getElementById("chengshi").innerHTML=activeX.responseText;
}
}
activeX.send();
}

</script>