//Basic Ajax Routine- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: Jan 15th, 06'

function createAjaxObj()
{
  var httprequest=false;
  if (window.XMLHttpRequest)
  { // if Mozilla, Safari etc
    httprequest=new XMLHttpRequest();
	if (httprequest.overrideMimeType)
	  httprequest.overrideMimeType('text/xml');
  }
  else if (window.ActiveXObject)
  { // if IE
    try
	{
      httprequest=new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch (e)
	{
      try
	  {
        httprequest=new ActiveXObject("Microsoft.XMLHTTP");
      }
	  catch (e)
	  {}
    }
  }
  return httprequest;
}

var ajaxpack=new Object();
ajaxpack.basedomain="http://"+window.location.hostname;
//ajaxpack.ajaxobj=createAjaxObj();
//ajaxpack.filetype="txt";
ajaxpack.addrandomnumber=0; //Set to 1 or 0. See documentation.

ajaxpack.getAjaxRequest=function(url, parameters, callbackfunc, filetype)
{
  ajaxpack.ajaxobj=createAjaxObj(); //recreate ajax object to defeat cache problem in IE
  if (ajaxpack.addrandomnumber==1) //Further defeat caching problem in IE
    var parameters=parameters+"&ajaxcachebust="+new Date().getTime();
  if (this.ajaxobj)
  {
    this.filetype=filetype;
    this.ajaxobj.onreadystatechange=callbackfunc;
    this.ajaxobj.open('GET', url+"?"+parameters, true);
    this.ajaxobj.send(null);
  }
}

ajaxpack.postAjaxRequest=function(url, parameters, callbackfunc, filetype)
{
  ajaxpack.ajaxobj=createAjaxObj(); //recreate ajax object to defeat cache problem in IE
  if (this.ajaxobj)
  {
	this.filetype=filetype;
    this.ajaxobj.onreadystatechange = callbackfunc;
    this.ajaxobj.open('POST', url, true);
    this.ajaxobj.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    this.ajaxobj.setRequestHeader("Content-length", parameters.length);
    this.ajaxobj.setRequestHeader("Connection", "close");
    this.ajaxobj.send(parameters);
  }
}