.item, .alternatingItem
{
    float: left;
    padding: 15px;
    margin: 5px;
    width: 200px;
    height: 100px;
    border: 1px solid threedshadow;
}

.item
{
    background: whitesmoke !important;    
}
.alternatingItem
{
    background: window !important;    
}

.item:hover, .alternatingItem:hover
{
    background: silver !important;    
}