var xmlhttp


function loadXMLDoc(url)
{
xmlhttp=null
// code for Mozilla, etc.
if (window.XMLHttpRequest)
  {
  xmlhttp=new XMLHttpRequest()
  }
// code for IE
else if (window.ActiveXObject)
  {
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")
  }
if (xmlhttp!=null)
  {
  xmlhttp.onreadystatechange=state_Change
  xmlhttp.open("GET",url,true)
  xmlhttp.send(null)
  }
else
  {
  alert("Your browser does not support XMLHTTP.")
  }
}
function state_Change()
{
// if xmlhttp shows "loaded"
if (xmlhttp.readyState==4)
  {
  // if "OK"
  if (xmlhttp.status==200)
  {
  document.getElementById('T1').innerHTML=xmlhttp.responseText
  }
  else
  {
  alert("Problem retrieving data:" + xmlhttp.statusText)
  }
  }
}

loadXMLDoc('http://www.linkreferral.com/networkads.pl?refid=' + refid + '&category=' + category + '&subcategory=' + subcategory + '&height=' + height + '&width=' + width)