all.js

这是本人最初练习ajax时的小程序,是用ＪＳＰ写的

var _xmlcallback;
var _xmlobj;
function postXmlHttpRequest(submitUrl,functioncallback){
  _xmlcallback=functioncallback;
  if(window.createRequest){
  try{
   _xmlobj=window.createRequest();
   _xmlobj.onreadystatechange=postxmlrequest;
   _xmlobj.open("get",submitUrl,true);
   _xmlobj.send();
     }catch(ee){}
}
 else if(window.XMLHttpRequest){
  _xmlobj=new XMLHttpRequest();
  _xmlobj.onreadystatechange=postxmlrequest;
  _xmlobj.open("get",submitUrl,true);
  _xmlobj.send();
}
 else if(window.ActiveXObject){
  _xmlobj=new ActiveXObject("Microsoft.XMLHTTP");
  _xmlobj.onreadystatechange=postxmlrequest;
  _xmlobj.open("get",submitUrl,true)
  _xmlobj.send();
}
function postxmlrequest(){
  if(_xmlobj.readyState==4&&_xmlobj.status==200){
  setTimeout(_xmlcallback,2);
}
}
}
function checklogin(){
  var username=document.getElementById("login").pwuser.value;
  var password=document.getElementById("login").pwpwd.value;
  var submitUrl="login?pwuser="+username+"&pwpwd="+password;
 postXmlHttpRequest(submitUrl,'showMessage()');
}

function  showMessage(){
  var notice=document.getElementById("login");
  if(notice!=null){
  notice.innerHTML=_xmlobj.responseText;
}
}