YAHOO.util.Event.onAvailable('nav', function(){
			this.className = 'dyn';
			YAHOO.util.Event.addListener(this, 'click', toggle);
			function toggle(e){
				var t = YAHOO.util.Event.getTarget(e);
				var n = t.parentNode.getElementsByTagName('ul');
				if(n[0] && t.nodeName.toLowerCase() === 'a'){
					n[0].style.display = n[0].style.display == 'block' ? 'none' : 'block';
					t.parentNode.className = n[0].style.display == 'block' ? 'open' : 'parent';
					YAHOO.util.Event.preventDefault(e);
				}						
			}
		})