.menu {
	height: 35px;
	display: block;
	font-size: 16px;
	width: 950px;
		}

		.menu ul {
			list-style: none;
			padding: 0;
			margin: 0;
		}

		.menu ul li {
			/* width and height of the menu items */  
			float: left;
			overflow: hidden;
			position: relative;
			text-align: center;
			line-height: 35px;
		}

		.menu ul li a {
			/* must be postioned relative  */ 
			position: relative;
			display: block;
			width: 135px;
			height: 35px;
			font-family: 'microsoft yahei';
			font-size: 14px;
			font-weight: bold;
			letter-spacing: 1px;
			text-transform: uppercase;
			text-decoration: none;
			cursor: pointer;
		}

		.menu ul li a span {
			/* all layers will be absolute positioned */
			position: absolute;
			left: 0;
			width: 135px;
		}

		.menu ul li a span.out {
			top: 0px;
		}

		.menu ul li a span.over,
		.menu ul li a span.bg {
			/* hide */  
			top: -35px;
		}

		/** 1st example **/

		#menu {
	background-color: #0054A7;
		}

		#menu ul li a {
			color: #FFFFFF;
		}

		#menu ul li a span.over {
			color: #FFF;
		}

		#menu ul li span.bg {
			/* height of the menu items */  
			height: 35px;
			background: url('menu-b.gif?2') center center no-repeat;
		}