div.img {
 -webkit-box-shadow: 2px 2px 4px rgba(0,0,0,0.4);
 -moz-box-shadow: rgba(0,0,0,0.4) 2px 2px 4px;
}

div#main {
 -webkit-box-shadow: 4px 4px 5px rgba(0,0,0,0.2);
 -moz-box-shadow: rgba(0,0,0,0.2) 4px 4px 5px;
}