#box1{
	position:absolute;
	width: 320px;
	height: 283px;
	left: 0;
	top: 0;
}
#box1 span{
	display:block;
	float:left;
}

#box2{
	position:absolute;
	width: 320px;
	height: 283px;	
	left: 320px;
	top: 0;
}
#box2 span{
	display:block;
	float:left;
}

#box3{
	position:absolute;
	width: 320px;
	height: 283px;	
	left: 640px;
	top: 0;
}
#box3 span{
	display:block;
	float:left;
}


/* ********************************** */

.mask1{
	position:absolute;
	left: 0;
	top: 0;	
	width:320px;
	height:283px;
	overflow:hidden;
}

.mask2{
	position:absolute;
	width: 320px;
	height: 283px;
	left: 320px;
	top: 0;
	overflow:hidden;
}

.mask3{
	position:absolute;
	left: 640px;
	top: 0;	
	width:320px;
	height:283px;
	overflow:hidden;
}

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