function getXmlHttp() {
  var xmlhttp = false;
  if (window.XMLHttpRequest)
  {
    xmlhttp = new XMLHttpRequest()
  }
  else if (window.ActiveXObject)// code for IE
  {
    try
    {
      xmlhttp = new ActiveXObject("Msxml2.XMLHTTP")
    } catch (e) {
      try
      {
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP")
      } catch (E) {
        xmlhttp=false
      }
    }
  }
  return xmlhttp;
}

function setInnerHTMLFromAjaxResponse(url, obj_id)
{
  var xmlhttp = new getXmlHttp();

  if (xmlhttp)
  {
    xmlhttp.onreadystatechange = 
            function ()
            {
              if (xmlhttp && xmlhttp.readyState==4)
              {
                if (xmlhttp.status==200)
                {
                  if(typeof obj_id == 'object') {

                    obj_id.innerHTML = xmlhttp.responseText;
                  } else {
                    document.getElementById(obj_id).innerHTML = 
                                          xmlhttp.responseText;
                  }
                } 
              }
            }
        xmlhttp.open("GET",url,true);
        xmlhttp.send(null);
  }
}