/*
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 == "aqtree3clickable") {
 processULELC(ul);
 }
 }
}

function processULELC(ul) {
 if (!ul.childNodes || ul.childNodes.length == 0) return;
 // Iterate LIs
 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) {
 associateELC(a,subul);
 } else {
 a.parentNode.className = "aq3bullet";
 }
 }
 }
}

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, true);
 return true;
 } else if (obj.attachEvent){
 var r = obj.attachEvent("on"+evType, fn);
 return r;
 } else {
 return false;
 }
}