.pop{
position: relative;
z-index: 0;
}

.pop:hover{
background-color: transparent;
z-index: 50;
}

.pop span{ /*CSS for enlarged image*/
position: absolute;
background-color: #ebebeb;
padding: 5px;
left: -1000px;
border: 1px solid black;
visibility: hidden;
color: black;
text-decoration: none;
}

.pop span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 2px;
}

.pop:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: -250px;
left: 70px; /*position where enlarged image should offset horizontally */

}

#box{ 
margin-right: 20px;
float:left;
}