div,a{margin:0;padding:0;}img{border:0px;}  
.container{
	overflow:hidden;
	width:900px;
	height:400px;
	margin-top:10px;
	padding-bottom: 10px;
	background-color: #FFF;
}  
.bg {
	height: 400px;
	width: 900px;
	background-image: url(../img_top001.jpg);
	background-repeat: no-repeat;
	background-position: 0 0;

}

.imgs a{display:block; width:900px;height:400px; z-index:1000;}  
.opBtn{
	width:280px;
	height:400px;
	position: absolute;
	top: 0px;
	right: 0px;
	z-index: 1700;
}  
.opBtn div{ position:absolute; top:0; right:0; z-index:2000;}  
.opBtn a{ display:block; width:280px; height:80px;}  
.navi_btn {
	width:280px;
	height:400px;
	float: right;
}
.navi_btn a {
	display:block;
	width:280px;
	height:80px;
}