var xmlHttp=null;

function get (str)
{
if (str.length==0)
  { 
  alert('Error');
  return;
  }
try
  {
  xmlHttp=new XMLHttpRequest();
  }
catch(e)
  {
  try
    {
    xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
  catch(e)
    {
    alert ("Your browser does not support XMLHTTP!");
    return;  
    }
  }
var url="include/_banner.php?banner_id=" + str;
url=url+"&sid="+Math.random();
xmlHttp.open("GET",url, false);
xmlHttp.send(null);
//alert(xmlHttp.responseText);
}