/********************************************************************************************/

/* AHAH functions by Phil Ballard                                                           */

/* This code is intended for study purposes.                                                */

/* You may use these functions as you wish, for commercial or non-commercial applications,  */

/* but please note that the author offers no guarantees to their usefulness, suitability or */

/* correctness, and accepts no liability for any losses caused by their use.                */

/********************************************************************************************/



function callAHAH(url, pageElement, callMessage, errorMessage) {

     document.getElementById(pageElement).innerHTML = callMessage;

     try {

     req = new XMLHttpRequest(); /* e.g. Firefox */

     } catch(e) {

       try {

       req = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */

       } catch (e) {

         try {

         req = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */

         } catch (E) {

          req = false;

         } 

       } 

     }

     req.onreadystatechange = function() {responseAHAH(pageElement, errorMessage);};

     req.open("GET",url,true);

     req.send(null);

  }



function responseAHAH(pageElement, errorMessage) {

   var output = '';

   if(req.readyState == 4) {

      if(req.status == 200) {

         output = req.responseText;

         document.getElementById(pageElement).innerHTML = output;

         } else {

         document.getElementById(pageElement).innerHTML = errorMessage+"\n"+output;

         }

      }

  }