/*
aqtree3clickable.js

Converts an unordered list to an explorer-style tree, with clickable
icons

To make this work, simply add one line to your HTML:
<script type="text/javascript" src="aqtree3clickable.js"></script>

and then make the top UL of your nested unordered list of class
"aqtree3clickable".

That's it. No registration function, nothing.

http://www.kryogenix.org/code/browser/aqlists/

Stuart Langridge, November 2002
sil@kryogenix.org

Inspired by Aaron's labels.js (http://youngpup.net/demos/labels/) and Dave Lindquist's menuDropDown.js (http://www.gazingus.org/dhtml/?id=109)

*/

addEvent(window, "load", makeTreesC);

function makeTreesC() {
  // We don't actually need createElement, but we do
  // need good DOM support, so this is a good check.
  if (!document.createElement) return;
  
  uls = document.getElementsByTagName("ul");
  for (uli=0;uli<uls.length;uli++) {
    ul = uls[uli];
    if (ul.nodeName == "UL" && ul.className == "MenuSystem") {
      processULELC(ul);
    }
  }
}

function processULELC(ul) {
  if (!ul.childNodes || ul.childNodes.length == 0) {
    return;
  }
  // Iterate LIs
  //if (ul.parentNode.parentNode.className== "MenuSystem") {
  //  subOpen='n';
  //} 
  for (var itemi=0;itemi<ul.childNodes.length;itemi++) {
    var item = ul.childNodes[itemi];
    if (item.nodeName == "LI") {
      // Iterate things in this LI
      var a;
      var subul;
	    subul = "";
      for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) {
        var sitem = item.childNodes[sitemi];
        switch (sitem.nodeName) {
          case "A": a = sitem; break;
          case "UL": subul = sitem; processULELC(subul); break;
        }
      }
      if (subul) {
        if ((location.protocol +"//" +location.hostname+location.pathname) == a.href) {
          a.parentNode.className = "ONaq3open";
          //alert('SubUL: ' + a.href);
          //subOpen='y';
        } else {
          //Check all Children to see if any are selected or open
          subOpen='n';
          AnyoneOpen(subul);        
          if (subOpen=='n'){
            associateELC(a,subul);
          } else {
            a.parentNode.className = 'aq3open';
          }
          //alert (subOpen);
          //alert('SubAsUL: ' + a.href );
        }

      } else {      
        if ((location.protocol +"//" +location.hostname+location.pathname) == a.href) {
          //alert('On: ' + a.href);
          a.parentNode.parentNode.parentNode.className = 'aq3open';
          a.parentNode.className = "ONaq3bullet";
          //subOpen='y';
          //alert('OnA: ' + a.href);
        } else {
          a.parentNode.className = "aq3bullet";
        }
      }
    }
  }
}

function AnyoneOpen(ul) {
  for (var t=0;t<ul.childNodes.length;t++) {
    var titem = ul.childNodes[t];
    if (titem.className == 'aq3open' || titem.className == 'ONaq3bullet' || titem.className == 'ONaq3open') {
      subOpen='y';
    }
    if (titem.nodeName=="UL") {     
      subul = titem; 
      AnyoneOpen(subul);
    }
  }
}

function associateELC(a,ul) {
  if(a.parentNode.className.indexOf('aq3open') == -1){
    a.parentNode.className = 'aq3closed';
  }
  ///a.onclick = function () {
  //this.parentNode.className = (this.parentNode.className=='aq3open') ? "aq3closed" : "aq3open";
  //return false;
  //}
}

/*              Utility functions                    */

function addEvent(obj, evType, fn){
  /* adds an eventListener for browsers which support it
     Written by Scott Andrew: nice one, Scott */
  if (obj.addEventListener){
    obj.addEventListener(evType, fn, false);
    return true;
  } else if (obj.attachEvent){
	  var r = obj.attachEvent("on"+evType, fn);
    return r;
  } else {
	  return false;
  }
}