var readyToGo = true;
function ajaxFunction(url, obj)
{  
  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()
  {
    /*
    State Description 
    0 The request is not initialized 
    1 The request has been set up 
    2 The request has been sent 
    3 The request is in process 
    4 The request is complete 
    */
	
    if(xmlHttp.readyState==4)
    {
	   readyToGo = true;
       obj.innerHTML=xmlHttp.responseText;
    }
	else
	{
 	//	obj.innerHTML="Loading...";
	}
  }
  if(readyToGo == true || url.indexOf("rdfile") > -1)
  {
  	readyToGo = false;
  	xmlHttp.open("GET",url,true);
  	xmlHttp.send(null);
  }

}