function create_ajax()
	{
	  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;
        }
      }
    }
	return xmlHttp;
	}
	
function run_ajax(processing_url, target_div)
	{
	
	ajax = create_ajax();
  
	ajax.onreadystatechange=function()
	  {
	  if(ajax.readyState==4)
		{
		document.getElementById(target_div).innerHTML=ajax.responseText;
		}
	  }
	  
	ajax.open("GET",processing_url,true);
	ajax.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
	ajax.send(null);
	}