function ajaxopen(div, url)
  {
  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()
	  {
	  if(xmlHttp.readyState==4)
		{
			document.getElementById(div).innerHTML = xmlHttp.responseText;
			document.getElementById('loading').style.display = 'none';
		}
		else
		{
			document.getElementById('loading').style.display = '';
		}
	  }

	xmlHttp.open("POST",url,true);
	xmlHttp.send(null);
  }