/*
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)

*/

var lastClicked;

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 == "tocTree") {
            processULELC(ul);
        }
    }
}
function processClicks(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") 
		{
			item.className = 'closed';
			for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) 
			{
                var sitem = item.childNodes[sitemi];				
                if(sitem.nodeName =="IMG" ) {						
                 	sitem.src = "../images/plus.gif";	
				}
			}
		}
	}


}
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 img = "";
            var subul;
	    	subul = "";
            for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) {
                var sitem = item.childNodes[sitemi];				
                switch (sitem.nodeName) {						
                    case "IMG": img = sitem; break;
					case "A": a = sitem; break;
                    case "UL": subul = sitem; 
                               processULELC(subul);
                               break;			
                }
            }
            if (subul) {
                associateELC(img,subul, ul);
            }
			//else if ( a ) {
          //      a.parentNode.className = "aq3bullet";
          //  }
			else { 
					//alert('nothing');
			}
        }
    }
}

function associateELC(img, ul, base) 
{	
    if (img.parentNode.className.indexOf('open') == -1)
      	img.parentNode.className = 'closed';
	else
		lastClicked = img;
		
		
    	img.onclick = function () 
		{		
			
	        this.parentNode.className = (this.parentNode.className=='open') ? "closed" : "open";
	        this.src = (this.parentNode.className=='open') ? "../images/minus.gif" : "../images/plus.gif";
			
			if ( lastClicked != null && this != lastClicked )
			{					
				lastClicked.src = "../images/plus.gif";
				lastClicked.parentNode.className = 'closed';				
			}
			lastClicked = this;
			
			return false;
			
	    }//end function onclick
}//end function associateELC


/*              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;
  }
}