ASP AJAX用法

<script language="javascript">
 function GetAJAX(targ,selObj,restore){
  var DataToSend = selObj.options[selObj.selectedIndex].value;
  
  var xmlhttp = false;
  var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  url = "quicksecond.asp?name="+DataToSend;
  //alert(url)
  xmlhttp.open("POST",url,true);
  xmlhttp.send(null);
  xmlhttp.onreadystatechange=function()
  {
   if (xmlhttp.readyState==4 || xmlhttp.readyState=='complete' ){
    document.getElementById("selectsecond").innerHTML = xmlhttp.responseText;
   }
  }
 }
</script>

上面的AJAX代码为下拉菜单联动方式。。。

<script language="javascript">
 function GetAJAX(id,sid){
  var DataToSend = id;
  var Datasid = sid;
  
if(document.getElementById(sid).innerHTML=="")
{
  var xmlhttp = false;
  var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  url = "quicksecond.asp?name="+DataToSend;
  //alert(Datasid)
  //alert(url)
  xmlhttp.open("POST",url,true);
  xmlhttp.send(null);
  xmlhttp.onreadystatechange=function()
  {
   if (xmlhttp.readyState==4 || xmlhttp.readyState=='complete'){
    document.getElementById(sid).innerHTML = xmlhttp.responseText;
   }
  }
}else
{
 document.getElementById(sid).innerHTML =""
}
 }
</script>

上面是普通的AJAX代码