ajax with ie problem

[rameshreddy]

hi, my project is based on ajax. my problem is project is not running properly, plz help me

my code is

req=false;

function setreq(){

			try {
			  // Firefox, Opera 8.0+, Safari
			   return new XMLHttpRequest();
			} catch (e) {
			  // Internet Explorer
			  try
			  {
			     return new ActiveXObject("Msxml2.XMLHTTP");
			  }
			  catch (e)
			  {
			    try
			      {
			      return new ActiveXObject("Microsoft.XMLHTTP");
			      }
			    catch (e)
			      {
			      alert("Your browser does not support AJAX!");
			      return false;
			      }
			    }
			  }
     }
function tutor(url,ids){
	  
req=setreq();

req.onreadystatechange=function(){
	if(req.readyState==4){
	document.getElementById(ids).innerHTML=req.responseText;
	}
}
req.open("POST",url,true);
req.send("");
}