#gallery
{
width: 510px;
margin: 45px auto;
background: white;
padding-bottom: 5px;
padding-right: 5px;
}

#gallery a
{
position: relative;
z-index: 10;
display: block;
float: left;
width: 150px;
height: 100px;
margin: 10px;
border-color: black;
}

#gallery img
{
width: 100%;
height: 100%;
border: 2px solid black;
}

#gallery a:hover
{
z-index: 50;
top: -45px;
left: -53px;
}

#gallery a:hover img
{
width: 400px; height: 300px;
padding: 1px;
background: #ccc;
border: 2px solid black;
}