.tab {}
	.tab * {float:left;}
	.tab .current {margin:5px;margin-top:-2px;}

	/* Demonstration css begin */
	.list {clear:both;margin-top:5px;}
	.list * {overflow:hidden;float:left;}
	.cell1 {width:10%;margin-right:3%;margin-left:1%}
	.cell2 {width:80%;}

	.tab_class {height:25px;padding-top:0px;position:relative;z-index:0;}
	.tab_class div {
		position:relative;z-index:0;top:1px;left:0px;
		display:block;float:left;
		text-align:center;
		padding-left:5px;padding-right:5px;
		padding-top: 5px;
		border:1px solid #ccc;
		background:#fff;
		height:25px;
		cursor:hand;
		margin-right:-1px;
	}
	.tab_class a {text-decoration:none;color:#000;}
	.tab_class .current a {text-decoration:none;color:#000;}
	.tab_class .current {
		position:relative;z-index:0;top:1px;left:0px;
		margin-top:0px;height:26px;
		border:1px solid #ccc;
		background:url("../Images/class.gif");
		cursor:hand;
		margin-top:-1px;
	}
	.tab_content {
		position:static;z-index:0;top:-7px;left:-5px;
		border:0px solid #ccc;padding:0px;
		border-bottom-color:#888;border-right-color:#888;
		height: 100%;	/* ҳǩÄÚÈݸ߶È100% */
		overflow: auto;
	}
	.tab_content .tab_page {margin:0px;display:none;}
	/* Demonstration css end */