/*
        PureDOM explorer
        written by Christian Heilmann (http://icant.co.uk)
        Please refer to the pde homepage for updates: http://www.onlinetools.org/tools/puredom/
        Free for non-commercial use. Changes welcome, but no distribution without
        the consent of the author.
*/
function pde_init()
{

/* CSS class names, change if needed */
        var mp='pde_nav';
        var hp='pde_hide';
        var sp='pde_show';
        var pp='pde_parent';
        var pa='pde_active';
        var cu='current';

        var d,uls,i;
        if(!document.getElementById && !document.createTextNode){return;}

/* navigation ID, change if needed */
        d=document.getElementById('nav');

        if (!d){return;}
        pde_addclass(d,mp)
        uls=d.getElementsByTagName('ul');
        for (i=0;i<uls.length;i++)
        {
                if(pde_checkcurrent(uls[i]))
                {
                        pde_addclass(uls[i].parentNode.firstChild,pa);
                } else {
                        pde_addclass(uls[i],hp);
                        pde_addclass(uls[i].parentNode.firstChild,pp);
                        uls[i].parentNode.firstChild.onclick=function()
                        {
                                pde_swapclass(this,pp,pa);
                                pde_swapclass(this.parentNode.getElementsByTagName('ul')[0],hp,sp);
                                return false;
                        }
                }
        }
        function pde_checkcurrent(o){
                if(pde_check(o.parentNode,cu)){return true;}
                for(var i=0;i<o.getElementsByTagName('li').length;i++)
                {
                        if(pde_check(o.getElementsByTagName('li')[i],cu)){return true;}
                }
                return false;
        }
        function pde_swapclass(o,c1,c2)
        {
                var cn=o.className
                o.className=!pde_check(o,c1)?cn.replace(c2,c1):cn.replace(c1,c2);
        }
        function pde_addclass(o,c)
        {
                if(!pde_check(o,c)){o.className+=o.className==''?c:' '+c;}
        }
        function pde_check(o,c)
        {
                 return new RegExp('\\b'+c+'\\b').test(o.className);
        }
}
window.onload=function(){
        pde_init();
        // add other functions here.
}