.tree{
		margin:0px;
		padding:0px;
	}
	.tree ul{	/*子结点*/
		margin-left:20px;	/* Left spacing */
		padding-left:0px;
	}
	.tree li{	/* 结点 */ 
		list-style-type:none;
		vertical-align:middle;
		
	}
	.tree li a{	/* 结点连接 */
		color:#FFFFFF;
		text-decoration:none;
		font-family:arial;
		font-size:0.8em;
		padding-left:2px;
	}