ul#tabnav{
	list-style-type:none;
	margin:0px;
	padding-left:0px;					/* 左侧无空隙 */
	padding-bottom:23px;
	border-bottom:1px solid #173976;	/* 菜单的下边框 */
	font:bold 12px verdana, arial;
}
ul#tabnav li{
	float:left;
	height:22px;
	background-color:#173976;
	margin:0px 3px 0px 0px;	
	border:1px solid #173976;
}
ul#tabnav a:link, ul#tabnav a:visited{
	display:block;						/* 块元素 */
	color:#ffffff;
	text-decoration:none;
	padding:5px 10px 3px 10px;
}
ul#tabnav a:hover{
	background-color:#d0e0fa;
	color:#173976;
}
body#first_day li.first_day, body#second_day li.second_day,	/* 当前页面的菜单项 */
body#third_day li.third_day{
	border-bottom:1px solid #FFFFFF;	/* 白色下边框，覆盖<ul>中的蓝色下边框 */
	color:#000000;
	background-color:#FFFFFF;
}
body#first_day li.first_day a:link, body#first_day li.first_day a:visited,	/* 当前页面的菜单项的超链接 */
body#second_day li.second_day a:link, body#second_day li.second_day a:visited,
body#third_day li.third_day a:link, body#third_day li.third_day a:visited
{
	color:#000000;
	background-color:#FFFFFF;
}
body#first_day li.first_day a:hover, body#second_day li.second_day a:hover,
body#third_day li.third_day a:hover{
	color:#006eb3;
	text-decoration:underline;
}