/*
aqtree3.js
http://www.kryogenix.org/code/browser/aqlists/

*/

addEvent(window, "load", makeTrees);

function makeTrees() {
// 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 == "aqtree3") {
processULEL(ul);
}
}
}

function processULEL(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; 
processULEL(subul);
break;
}
}
if (subul) {
associateEL(a,subul);
} else {
a.parentNode.style.listStyleImage = "url(bullet.gif)";
}
}
}
}

function associateEL(a,ul) {
a.onclick = function () {
var display = ul.style.display;
this.parentNode.style.listStyleImage = (display == "block") ? "url(plus.gif)" : "url(minus.gif)";
ul.style.display = (display == "block") ? "none" : "block";
return false;
}
a.onmouseover = function() {
var display = ul.style.display;
window.status = (display == "block") ? "Collapse" : "Expand";
	return true;
}
a.onmouseout = function() {
window.status = "";
	return true;
}
}

/*              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;
}
}