function ajaxRequest(){
 var activexmodes=["Msxml2.XMLHTTP", "Microsoft.XMLHTTP"] //activeX versions to check for in IE
 if (window.ActiveXObject){ //Test for support for ActiveXObject in IE first (as XMLHttpRequest in IE7 is broken)
  for (var i=0; i<activexmodes.length; i++){
   try{
    return new ActiveXObject(activexmodes[i])
   }
   catch(e){
    //suppress error
   }
  }
 }
 else if (window.XMLHttpRequest) // if Mozilla, Safari etc
  return new XMLHttpRequest()
 else
  return false
};

function ShowIt(theval) {
var req = ajaxRequest();
if (req==null) {
	alert("Browser does not support HTTP Request");
	return;
}

req.onreadystatechange = function () {
if(req.readyState != 4) {
document.getElementById('loadlist').innerHTML="<img src='_images/loader.gif' alt='loader' width='16' height='16' style='vertical-align:middle'/>&nbsp;<b>Loading...</b>";
} else {
document.getElementById('loadlist').innerHTML="";
      if (req.status==200) {
           document.getElementById('theaterlist').innerHTML=req.responseText; //return value;
      } else {
   	alert("An error has occured making the request");
      }
 }
};

var queryString = "?state=" + theval;
req.open("GET", "process_theaters.php" + queryString, true);
req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=iso-8859-1"); // set Header
req.send(null); 
};