#box_l {
	float: left;
	width: 319px;
	padding-top: 10px;
	padding-bottom: 30px;
}
#box_r {
	float: right;
	width: 322px;
	padding-top: 10px;
	padding-bottom: 30px;
}
.ma20 {
	margin-top: 20px;
}
#ma_clear {
	clear: both;
}