var xmlHttp;
function checkuser(netid,pswd) {
     if (netid.length==0)
      { 
       document.getElementById("ansid").innerHTML="";
       return;
      }
      xmlHttp=GetXmlHttpObject();
      if (xmlHttp==null)
      {
       alert ("Your browser does not support AJAX!");
       return;
      } 
      var1_1=document.getElementById("a1").value;
      var1_2 =document.getElementById("a2").value;
      //alert("we know the error under testing" +var1_1 );
      
     var url="ldap_redirection.php";
     url=url+"?netid="+netid;
     url=url+"&pswd="+pswd;
     url=url+"&sid="+Math.random();
     xmlHttp.onreadystatechange=stateChanged;
     xmlHttp.open("GET",url,true);
     xmlHttp.send(null);
   } 

    function stateChanged() 
    { 
     if (xmlHttp.readyState==4)
      { 
       if(xmlHttp.responseText!="Login Failed")
       {	
        //alert (xmlHttp.responseText)
        window.location=xmlHttp.responseText;
       }
       else
       {
        alert (xmlHttp.responseText);
       	document.getElementById("ansid").innerHTML=xmlHttp.responseText;
       }
      }
    }

    function GetXmlHttpObject()
    {
     var xmlHttp=null;
     try
     {
  // Firefox, Opera 8.0+, Safari
      xmlHttp=new XMLHttpRequest();
     }
     catch (e)
     {
  // Internet Explorer
      try
       {
        xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
       }
      catch (e)
       {
         xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
       }
     }
    return xmlHttp;
    }