function updt()
{ 
var id_txt=document.getElementById("id_txt").value;
var status_txt=document.getElementById("status_txt").value;
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
 {
 alert ("Please fill");
 return;
 } 
url='../feedback/update.php?id_txt='+id_txt+'&status_txt='+status_txt;
//alert(url);
xmlHttp.onreadystatechange=stateChanged13;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
function stateChanged13() 
{
var newWin;
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
//xmlHttp.responseText;
var ss = xmlHttp.responseText;
alert (ss);
} 
}  
 }
function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}
var xmlhttp;