.box1 {
	position: relative;
	float: left;
	width: 530px;
	height: 150px;
	text-align: right;
}
.box2 {
	position: relative;
	float: right;
	width: 530px;
	height: 150px;
	text-align: left;
}
.box3 {
	position: relative;
	float: left;
	width: 530px;
	height: 300px;
	text-align: right;
	margin-top: 50px;
}
.box4 {
	position: relative;
	float: right;
	width: 530px;
	height: 300px;
	text-align: left;
	margin-top: 50px;
}
.ref_img {
	position: relative;
	float: left;
	width: 160px;
	height: 101px;
	border: 0px;
}