div.container	{
	width: 600px;
	margin: auto;
	}
div.return	{
	text-align: center;
	}
h1	{
	text-align: center;
	}
p	{
	padding: 0 20px;
	margin: 10px;
	}
#contents img	{
	padding : 0 20px;
	}
#img1	{
	float: left;
	width: 240px;
	height: 180px;
	}
#img2	{
	float: right;
	width: 240px;
	height: 180px;
	}
#img3	{
	float: left;
	width: 240px;
	height: 180px;
	}
#img4	{
	float: right;
	width: 240px;
	height: 180px;
	}
.clear	{
	clear: both;
	margin: 0;
	border: 0;
	padding: 0;
	font-size: 0;
	line-height: 0;
	height: 0;
	visibility: hidden;
	}