/*
Written by Burt Petrescue 2007
*/

function GetControlType() {
 if (GetControlType.currentct)
  return GetControlType.currentct;
 var p = ["MSXML2","Microsoft","MSXML","MSXML3"];
 var test1, test2;
 for (var i=0;i<p.length;i++) {
  try {
   test1 = new ActiveXObject(p[i] + ".XmlHttp");
   test2 = new ActiveXObject(p[i] + ".XmlDom");
   return GetControlType.currentct = p[i];
  }
  catch (ex) {};
 }
}

function XmlHttp() {}
XmlHttp.create = function () {
 try {
  if (window.XMLHttpRequest) {
   var xhr = new XMLHttpRequest();
   // Older Mozilla does not allow readyState. Handle this
   if (xhr.readyState == null) {
    xhr.readyState = 1;
    xhr.addEventListener("load", function () {
     xhr.readyState = 4;
     if (typeof xhr.onreadystatechange == "function")
      xhr.onreadystatechange();
    }, false);
   }
   return xhr;
  }
  if (window.ActiveXObject) {
   return new ActiveXObject(GetControlType() + ".XmlHttp");
  }
 }
 catch (ex) {}
};

if (window.XMLSerializer &&	window.DOMParser &&	window.Node){
 if (Node.prototype.__defineGetter__ && Node.prototype) {
 	Document.prototype.loadXML = function (x) {
 		var thisdoc = (new DOMParser()).parseFromString(x, "text/xml");
 		while (this.hasChildNodes())
 			this.removeChild(this.lastChild);
 		for (var i=0;i<thisdoc.childNodes.length;i++) {
 			this.appendChild(this.importNode(thisdoc.childNodes[i], true));
 		}
 	};
 	Document.prototype.__defineGetter__("xml", function(){
 		return (new XMLSerializer()).serializeToString(this);
 	});
 }
}

/*
loadXMLurl(xmlurl, loadingfunct, donefunct, doneparameter1, doneparameter2, doneparameter3)
description: an Asynchronous ajax script which visits a url and returns the results to the function you specify once it is complete.
important: this function is wrapped by compose_and_send_packet and shouldn't be used by itself UNLESS calling a url outside of the ajax application
parameters:
  xmlurl - the complete url to send to or load from
  loadingfunct - executes this function upon the initial asynchronous call to xmlurl. the function definition must not have any parameters
  donefunct - executes this function once the call to xmlurl has completed. the function definition must be donefunct(responsetext,param1,param2,param3) where param1-3 are optional. responsetext is the exact response from the xmlurl. According to our ajax guidelines, this response must be processed with SplitResponse at the top of the donefunct procedure
  doneparameter1-3 - optional parameters that are sent to donefunct. Note that doneparameter1 actually ends up being parameter #2 in donefunct since the first parameter is reserved for responsetext
*/
function loadXMLurl(xmlurl, loadingfunct, donefunct, doneparameter1, doneparameter2, doneparameter3) {
 var isasync=true;//used to be parameter, but proper coding always calls for async programming
 var xmlhttpobj = XmlHttp.create();
	xmlhttpobj.open("GET", xmlurl, isasync);
	if (isasync) {
  if (loadingfunct!=null)
   loadingfunct();
  if (donefunct!=null){
   xmlhttpobj.onreadystatechange = function () {
    if (xmlhttpobj.readyState == 4) {//if (xmlhttpobj.status == 200)
     if (doneparameter3!=null) donefunct(xmlhttpobj.responseText,doneparameter1,doneparameter2,doneparameter3);
     else {
      if (doneparameter2!=null) donefunct(xmlhttpobj.responseText,doneparameter1,doneparameter2);
      else {
       if (doneparameter1!=null) donefunct(xmlhttpobj.responseText,doneparameter1);
       else donefunct(xmlhttpobj.responseText);
      }
     }
    }
    xmlhttpobj.close;
  }
	 }
	}
	xmlhttpobj.send(null);
	if (!isasync) {
  if (donefunct!=null){
   if (doneparameter3!=null) donefunct(xmlhttpobj.responseText,doneparameter1,doneparameter2,doneparameter3);
   else {
    if (doneparameter2!=null) donefunct(xmlhttpobj.responseText,doneparameter1,doneparameter2);
    else {
      if (doneparameter1!=null) donefunct(xmlhttpobj.responseText,doneparameter1);
      else donefunct(xmlhttpobj.responseText);
    }
   }
   xmlhttpobj.close;
  }
	}
}


var Resp_Code=AJXC_Response_Fail;
var Resp_Data='';
var Resp_ExtraData='';
function SplitResponse(data) {
  Resp_Code=AJXC_Response_Fail;
  var a=data.split(AJXC_Delim_Main);
  if (a.length!=5) {
    Resp_Data=data;//Probably a php error
    return false;
  }
  if (a[0]!=AJXC_Begin) {
    Resp_Data=-22;
    return false;
  }
  if (a[4]!=AJXC_End) {
    Resp_Data=-23;
    return false;
  }
  Resp_Code=a[1];
  Resp_Data=a[2];
  Resp_ExtraData=a[3];
  if (Resp_Code!=AJXC_Response_Success) return false;
  return true;
}

/*
compose_and_send_packet(ajfile,data,extradata,loadingfunct,donefunct,doneparameter1,doneparameter2,doneparameter3)
description: standardizes the information exchange of the ajax application. This function wraps loadXMLurl, an Asynchronous ajax script which visits a url and returns the results to the function you specify once it is complete.
note: see notes at top of _inc-functions-ajax.inc for details on ajax info exchange
parameters:
  ajfile - the simple file name (no directory) to comminicate with. This file must be located within the admin/ajx/ folder. For a quick starter, use ajx/TEMPLATE.php
  data - the data to send the ajfile.
  extradata - another field to send data through. see _inc-functions-ajax.inc for more info.
  loadingfunct - see definition in the above loadXMLurl notes
  donefunct - see definition in the above loadXMLurl notes
  doneparameter1-3 - see definition in the above loadXMLurl notes
*/
function compose_and_send_packet(ajfile,data,extradata,loadingfunct,donefunct,doneparameter1,doneparameter2,doneparameter3, speciallocation) {
  var packet=escape(AJXC_Begin+AJXC_Delim_Main+data+AJXC_Delim_Main+extradata+AJXC_Delim_Main+AJXC_End);
  if (speciallocation != "" && speciallocation != null) AJXC_Folder=speciallocation;
  var url='/'+AJXC_Folder+ajfile+'?p='+packet+'&rnd='+Math.random();
//  document.location.href=url;// Used for Debugging an AJAX post
  loadXMLurl(url, null, donefunct,doneparameter1,doneparameter2,doneparameter3);
}

function convert_underscores(x){
  return x.replace(/_/g,' ');
}