.fondofotito1 { background-image:url(../graf/c1.gif); background-repeat:no-repeat; width:120px; height:100px; text-align:center;} 
.fondofotito2 { background-image:url(../graf/c2.gif); background-repeat:no-repeat; width:115px; height:100px; text-align:center;} 
.fondofotito3 { background-image:url(../graf/c3.gif); background-repeat:no-repeat; width:120px; height:100px; text-align:center;}