// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// You may *NOT* re-distribute this code in any way except through its
// use. That means, you can include it in your product, or your web
// site, or any other form where the code is actually being used. You
// may not put the plain javascript up on your site for download or
// include it in your javascript libraries for download. 
// If you wish to share this code with others, please just point them
// to the URL instead.
// Please DO NOT link directly to my .js files from your site. Copy
// the files to your server and use them there. Thank you.
// ===================================================================

addEvent(window,"load",convertTrees);
function addEvent(o,e,f)
{
    if(o.addEventListener)
    {
    o.addEventListener(e,f,true);return true;
    }
    else if(o.attachEvent)
    {
    return o.attachEvent("on"+e,f);}else{return false;
    }
}

function setDefault(name,val)
{
    if(typeof(window[name])=="undefined" || window[name]==null)
    {
    window[name]=val;
    }
}

function expandTree(treeId)
{
    var ul = document.getElementById(treeId);
    if(ul == null)
    {
        return false;
    }
    expandCollapseList(ul,nodeOpenClass);
}

function collapseTree(treeId)
{
    var ul = document.getElementById(treeId);
    if(ul == null)
    {
        return false;
    }
    expandCollapseList(ul,nodeClosedClass);
}

function expandToItem(treeId,itemId)
{
	
    var ul = document.getElementById(treeId);
    if(ul == null)
        {
        return false;
        }
    var ret = expandCollapseList(ul,nodeOpenClass,itemId);
    if(ret)
    {
        var o = document.getElementById(itemId);
        if(o.scrollIntoView)
        {
            o.scrollIntoView(false);
        }
    }
}

function expandCollapseList(ul,cName,itemId)
{
    if(!ul.childNodes || ul.childNodes.length==0)
    {
        return false;
    }
    for(var itemi=0;itemi<ul.childNodes.length;itemi++)
    {
    var item = ul.childNodes[itemi];
    if(itemId!=null && item.id==itemId)
        {
        return true;
        }
    if(item.nodeName == "LI")
            {
            var subLists = false;
            for(var sitemi=0;sitemi<item.childNodes.length;sitemi++)
               {
                        var sitem = item.childNodes[sitemi];
                        if(sitem.nodeName=="UL")
                        {
                            subLists = true;
                            var ret = expandCollapseList(sitem,cName,itemId);
                            if(itemId!=null && ret)
                        {
                            item.className=cName;return true;
                        }
                     }
                }
                if(subLists && itemId==null)
                    {
                        item.className = cName;
                    }
               }
    }
}

function convertTrees()
{
    setDefault("treeClass","mktree");
    setDefault("nodeClosedClass","liClosed");
    setDefault("nodeOpenClass","liOpen");
    setDefault("nodeBulletClass","liBullet");
    setDefault("nodeLinkClass","bullet");
    setDefault("preProcessTrees",true);
    if(preProcessTrees)
        {
        if(!document.createElement)
            {
                return;
            }
        uls = document.getElementsByTagName("ul");
        for(var uli=0;uli<uls.length;uli++)
            {
                var ul=uls[uli];
                if(ul.nodeName=="UL" && ul.className==treeClass)
            {
                processList(ul);
            }
        }
    }
}

function processList(ul)
{
    if(!ul.childNodes || ul.childNodes.length==0)
    {
        return;
    }
    for(var itemi=0;itemi<ul.childNodes.length;itemi++)
        {
            var item = ul.childNodes[itemi];
            if(item.nodeName == "LI")
            {
                var subLists = false;
                for(var sitemi=0;sitemi<item.childNodes.length;sitemi++)
                {
                    var sitem = item.childNodes[sitemi];
                    if(sitem.nodeName=="UL")
                        {
                        subLists = true;processList(sitem);
                        }
                }
                var s= document.createElement("SPAN");
                var t= '\u00A0';
                s.className = nodeLinkClass;
                if(subLists)
                {
                if(item.className==null || item.className=="")
                    {
                    item.className = nodeClosedClass;
                    }
                if(item.firstChild.nodeName=="#text")
                    {
                    t = t+item.firstChild.nodeValue;
                    item.removeChild(item.firstChild);
                    }
                s.onclick = function()
                    {
                        this.parentNode.className =(this.parentNode.className==nodeOpenClass) ? nodeClosedClass : nodeOpenClass;
                        return false;
                    }
                }
            else
                {
                    item.className = nodeBulletClass;
                    s.onclick = function()
                    {
                        return false;
                    }
                }
            s.appendChild(document.createTextNode(t));
            item.insertBefore(s,item.firstChild);
        }
    }
}