function getAjaxObj()
{
    if (window.XMLHttpRequest)
    {
		         http_request = new XMLHttpRequest();
		         if (http_request.overrideMimeType)
		         {
		            http_request.overrideMimeType('text/xml');
		         }
    }
    else if (window.ActiveXObject)
    {
        try
        {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
           try
           {
              http_request = new ActiveXObject("Microsoft.XMLHTTP");
           }
           catch (e)
           {
           }
        }
     }
  return http_request;
}


function removeWarning()
{
  if(document.getElementById('renewWarningElem'))
  {
    document.getElementById('renewWarningElem').innerHTML = "";
     var f = getAjaxObj();
     f.onreadystatechange = function()
     {
     };
     var url = "/removeWarnings.php";
     f.open('GET', url, true);
 	 f.send(null);
  }
}