h1
{
    text-align:center;
    text-underline:none;
}

.box
{
    display:block;    
    width: 640px;
    margin-left:auto;
    margin-right:auto;
}

.imagebox
{
    width:160px;
    margin: 20px 20px 20px 20px;
    float: left;
}

.imagebox img
{
    border: none;
}

.imagebox .span
{
    text-align:center;
}

div.spacer {
  clear: both;
}