.board{
	display: block;
 	 margin-left: auto;
 	 margin-right: auto;
}
.imgmain {
	position: relative;
	z-index: 1;
	display: block;
	width: 1000px;
	margin-left: auto;
 	margin-right: auto;
}
.imgframe {
	position: absolute;
	right: 0px;
	top: 0px;
	z-index: 100;
}