og.children("li").length > 8) {
				log.get(0).removeChild(log.children("li")[0]);
			}
		}
		function getTime() {
			var now= new Date(),
			h=now.getHours(),
			m=now.getMinutes(),
			s=now.getSeconds(),
			ms=now.getMilliseconds();
			return (h+":"+m+":"+s+ " " +ms);
		}

		var newCount = 1;
		function add(e) {
			var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
			isParent = e.data.isParent,
			nodes = zTree.getSelectedNodes(),
			treeNode = nodes[0];
			if (treeNode) {
				treeNode = zTree.addNodes(tree