function getXMLHTTP() {
  result = false;
  if(typeof XMLHttpRequest != "undefined") {
    result = new XMLHttpRequest();
  } else {
    try {
        result = new ActiveXObject("MSXML2.XMLHTTP");
    } catch (e) {
        try {
            result = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (ie) {}
    }
  }
  return result;
}

function ajax_init ()
{	
	return getXMLHTTP ();
}