.big-photo { position: absolute; left: 0px; top: 0px; border: 7px solid #ffffff; left: 250px; top: 150px; }
.big-photo img { border: 5px solid #000000; }
.pre-photo1 { left: 250px; top: 377px; }
.pre-photo2 { left: 348px; top: 377px; }
.pre-photo3 { left: 446px; top: 377px; }
.pre-photo4 { left: 544px; top: 377px; }