.pagetop { 
    display: none; 
    position: fixed; 
    bottom: 30px; 
    right: 15px; 
} 
.pagetop a { 
    display: block; 
    background-color: #ccc; 
    text-align: center; 
    color: #222; 
    font-size: 12px; 
    text-decoration: none; 
    padding: 8px 15px; 
    filter:alpha(opacity=80); 
    -moz-opacity: 0.8; 
    opacity: 0.8; 
} 
.pagetop a:hover { 
    display: block; 
    background-color: #cfcfcf; 
    text-align: center; 
    color: #333; 
    font-size: 12px; 
    text-decoration: none; 
    padding:8px 15px; 
    filter:alpha(opacity=50); 
    -moz-opacity: 0.5; 
    opacity: 0.5; 
}