/* Sample 5*/
#box5{
	position:absolute;
	width:850px;
}
#box5 span{
	display:block;
	z-index: 1;
}

.mask2{
	position:relative;
	width:850px;
	height:300px;
	overflow:hidden;
}

span img{
	display:block;
	border:none;
}