#main_board {
	width: 770px;
	height: 315px;
	background-image: url("../../image/top_background_770x315.gif");
	background-position: top left;
	background-repeat: no-repeat;
}
#mb_banner_box {
	float: right;
	margin-top: 100px;
	margin-right: 8px;
}
#mb_banner_box a {
	text-decoration: none;
}
.mb_bb_banner {
	width: 150px;
	height: 162px;
	margin-left: 6px;
}