function get_banner_urls($id, $name, $size, $sid){	
	var xmlHttp;
  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      try
        {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
      catch (e)
        {
        alert("Your browser does not support AJAX!");
        return false;
        }
      }
    }
	xmlHttp.onreadystatechange=function()
    {
      if(xmlHttp.readyState==4)
      {
	  	//alert(xmlHttp.responseText);
		open_banner_urls(xmlHttp.responseText, $id);
		//document.getElementById('uf6').value = xmlHttp.responseText;
		
	  }
    }
	xmlHttp.open("GET","./banner_track.php?id="+$id+"&name="+$name+"&size="+$size+"&sid="+$sid,true);
	xmlHttp.send(null);
}