.div1 {
	float: left;
	/*border: 1px solid green;*/
	width: 426px;
	height: 394px;
}

.div1 img{
	position: absolute;
	
}

.fimg {
	display: block;
	z-index: 1;
}

.bimg {
	z-index: 0;
	display: none;
}