function click() {
			if(this.className=="folder") {
				var ul = this.parentNode.getElementsByTagName('ul');
				if(ul[0].className=="submenu") {
					ul[0].style.display = (ul[0].style.display=="block")? "none":"block";
				}
			}
			return false;
		}

		function start() {
				var ul = document.getElementsByTagName('ul');
 				for(i=0;i<ul.length;i++) {
					if(ul[i].className=="submenu") {
						ul[i].style.display="none";
					}
				}
				
				var a = document.getElementsByTagName('a');
				for(i=0; i< a.length;i++) {
					if(a[i].className=="folder") {
						try {
							a[i].addEventListener('click', 'return false', false);
							a[i].addEventListener('click', click, false);
						}
						catch (exception) {
							a[i].onclick = 'return false';
							a[i].onclick = click;
						}
					}
				}
		}