var xmlHttp


function switchstate(sta)
 { 
 xmlHttp=GetXmlHttpObject()
 if (xmlHttp==null)
  {
  alert ("Browser does not support HTTP Request")
  return
  } 
 var url="sw_state.php"
 url=url+"?s="+sta
 url=url+"&sid="+Math.random()
 xmlHttp.onreadystatechange=stateswitched 
 xmlHttp.open("GET",url,true)
 xmlHttp.send(null)
 } 

function stateswitched() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("txtState").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;
}