function ajaxFunction (urlOpen, changeId, waitString)
{
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("Sorry browser does not support AJAX!");
      return false;
      }
    }
  }
  xmlHttp.onreadystatechange=function()
    {
    if(xmlHttp.readyState==4)
      {
		var response =xmlHttp.responseText;
		document.getElementById(changeId).innerHTML= response;
      }
    }
   
  document.getElementById(changeId).innerHTML= waitString;  
  var randomnumber=Math.floor(Math.random()*11)
  urlOpen = urlOpen + "&random=" + randomnumber;
   
  xmlHttp.open("GET",urlOpen,true);
  xmlHttp.send(null);
  }