.buttons span{background:url(http://nettech.com/grotto/images/product-off.jpg) no-repeat; width:14px; height:14px; cursor:pointer}
.buttons span.active{background:url(http://nettech.com/grotto/images/product-on.jpg) no-repeat; width:14px; height:14px;}

/* Sample 4*/
#box4{
	position:absolute;
}
#box4 div{
	width:432px;
	height:510px;
	float:left;
	background:#eee;
}

.mask3{
	position:relative;
	width:432px;
	height:510px;
	overflow:hidden;
}