// JScript 文件
var request;
function createRequest() {
  try {
    request = new XMLHttpRequest();
  } catch (trymicrosoft) {
    try {
      request = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (othermicrosoft) {
      try {
        request = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (failed) {
        request = false;
      }
    }
  }
  if (!request)
    alert("Error initializing XMLHttpRequest!");
}
//*******
//第一个请求
//*******
function getCustomerInfo(userid,pwd) {
  createRequest();
  var url='checklogin.aspx?userid='+userid+'&pwd='+encodeURIComponent(pwd);
  request.open("GET",url,true);
  request.onreadystatechange=updatepage;
  request.send(null);
}
function updatepage(){
    if(request.readyState==4){
        if(request.status==200){
           printmsg();//处理服务器端返回的信息.
           
        }
    }
    else{
       document.getElementById("loging").style.display="block";
       document.getElementById("Panellogin").style.display="none";

    }
}

function printmsg(){
    var result=parseInt(request.responseText);
    switch(result){
    case 0:
        alert("用户名或密码不能为空!");
        document.getElementById("Panellogin").style.display="block";
        document.getElementById("loging").style.display="none";
        location="login.aspx";
        break;
    case 1:
        document.getElementById("Panellogin").style.display="none";
        self.location="login.aspx";
        break;
    case 2:
        alert("用户名或密码错误!");
        document.getElementById("Panellogin").style.display="block";
        document.getElementById("loging").style.display="none";
        location="login.aspx";
        break;
    case 3:
        alert("用户已经登陆或您未正常退出,请等待过期后再登陆!");
        document.getElementById("Panellogin").style.display="block";
        document.getElementById("loging").style.display="none";
        location="login.aspx";
        break;
    default:
            location="login.aspx";
             break;
    
    }
    
}