// JavaScript Document

var xmlHttp
xmlHttp=GetXmlHttpObject()

function check_tab(res_loc)
{
  	var url; 
    url="index.php?res_location= "+res_loc;
 	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("post",url,true);
	xmlHttp.send(null);
	//Myfunction();
} 

function GetXmlHttpObject()
{
var xmlHttp=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    var aVersions = [ "MSXML2.XMLHttp.5.0",
        "MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0",
        "MSXML2.XMLHttp","Msxm12.XMLHTTP","Microsoft.XMLHttp"];

    for (var i = 0; i < aVersions.length; i++) 
	 {
        try {
            var xmlHttp = new ActiveXObject(aVersions[i]);
            return xmlHttp;
            } 
		catch (oError) 
		   {
            //Do nothing
           }
    }
    }
  catch (e)
    {
    }
  }
  if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
return xmlHttp;
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("pr").innerHTML=xmlHttp.responseText 
} 
}