.tdl1 a{float:left;width:140px;height:140px;background:url(img/impressions/tdl/1.png)}
.tdl1 a:hover{background:url(img/impressions/tdl/1_thumbs.png)}
.tdl2 a{float:left;width:140px;height:140px;background:url(img/impressions/tdl/2.png)}
.tdl2 a:hover{background:url(img/impressions/tdl/2_thumbs.png)}
.tdl3 a{float:left;width:140px;height:140px;background:url(img/impressions/tdl/3.png)}
.tdl3 a:hover{background:url(img/impressions/tdl/3_thumbs.png)}