.top_bg{
	background: url(../images/sw_bg.jpg) no-repeat;
	position: static;
	margin: 0 auto;
	background-size: 100%;
	background-attachment: fixed;
}
.contentsarea{
	background: url(../images/download/bg.png) no-repeat;
	width:800px;
	height: 600px;
	text-align: center;
	margin: auto auto;
}
.download{
	width: 507px;
	height: 300px;
	text-align: center;
	padding-top: 150px;
	margin:0 auto;
}
.enter{
	width: 100px;
	height: 50px;
	min-width: 0px;
	display: block;
	margin-top: 0px;
	margin-left: auto;
	margin-right: auto;
	padding-top: 15px;
}