.image_01{
	width:750px;
	height:500px;
	background-image:url(image/image01.jpg);
}
.image_02{
	width:750px;
	height:500px;
	background-image:url(image/image02.jpg);
}
.image_03{
	width:750px;
	height:250px;
	background-image:url(image/image03.jpg);
}