var xmlHttp_get_roio

function ajax_get_roio(str, str2)
{
//alert(str2);
//if (str.length==0)
//  { 
//  document.getElementById("txtHint").innerHTML="";
//  return;
//  }
xmlHttp_get_roio=GetXmlHttpObject();
if (xmlHttp_get_roio==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="/ajax/get_roio.php";
url=url+"?concert_id="+str+"&bootleg_id="+str2;
//alert (url);
// url=url+"&sid="+Math.random();
xmlHttp_get_roio.onreadystatechange=stateChanged_get_roio;
xmlHttp_get_roio.open("GET",url,true);
xmlHttp_get_roio.send(null);
} 


function stateChanged_get_roio() 
{ 
if (xmlHttp_get_roio.readyState==4)
	document.getElementById("roio_info").innerHTML=xmlHttp_get_roio.responseText;

if (xmlHttp_get_roio.readyState==1 || xmlHttp_get_roio.readyState=="loading") 
	document.getElementById("roio_info").innerHTML="<div align=center><br/><br/><br/><img src=\"/images/big-ajax-loader.gif\"></div>"
}

function GetXmlHttpObject()
{
var xmlHttp_get_roio=null;
try
  {
  // Firefox, Opera 8.0+, Safari
  xmlHttp_get_roio=new XMLHttpRequest();
  }
catch (e)
  {
  // Internet Explorer
  try
    {
    xmlHttp_get_roio=new ActiveXObject("Msxml2.XMLHTTP");
    }
  catch (e)
    {
    xmlHttp_get_roio=new ActiveXObject("Microsoft.XMLHTTP");
    }
  }
return xmlHttp_get_roio;
}