var xmlhttp;

function getVote(int,pid)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
/* poll_vote is relative to poll index page */
var url="http://www.sheffield.nhs.uk/pgrating/poll_vote.php";
url=url+"?o1="+int;
url=url+"&p="+pid;

//$_SERVER['REQUEST_URI']
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function stateChanged()
{
  if (xmlhttp.readyState==4)
  {
  document.getElementById("poll_area").innerHTML=xmlhttp.responseText;
  }
}

function GetXmlHttpObject()
{
var objXMLHttp=null;
if (window.XMLHttpRequest)
  {
  objXMLHttp=new XMLHttpRequest();
  }
else if (window.ActiveXObject)
  {
  objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
return objXMLHttp;
}