var xmlHttp_trade

function ajax_trade(str)
{
//alert(str2);
//if (str.length==0)
//  { 
//  document.getElementById("txtHint").innerHTML="";
//  return;
//  }
xmlHttp_trade=GetXmlHttpObject();
if (xmlHttp_trade==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 

var pieces=str.split(':'); 

//concert_id:bootelg_id:action (add/multiAdd/remove/none)


var url="/ajax/get_trade.php";
url=url+"?p="+str;
// alert (url);

xmlHttp_trade.onreadystatechange=stateChanged_trade;

xmlHttp_trade.open("GET",url,true);
xmlHttp_trade.send(null);
} 


function stateChanged_trade() 
{ 
	if (xmlHttp_trade.readyState==4){
		document.getElementById("ajax_trade").innerHTML=xmlHttp_trade.responseText;
	}
	if (xmlHttp_trade.readyState==1 || xmlHttp_trade.readyState=="loading") {
		document.getElementById("ajax_trade").innerHTML="<div align=center><br/><br/><br/><img src=\"/images/big-ajax-loader.gif\"></div>";
	}
}

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