.liasses1 a{float:left;width:140px;height:140px;background:url(img/impressions/liasses/1.png)}
.liasses1 a:hover{background:url(img/impressions/liasses/1_thumbs.png)}
.liasses2 a{float:left;width:140px;height:140px;background:url(img/impressions/liasses/2.png)}
.liasses2 a:hover{background:url(img/impressions/liasses/2_thumbs.png)}
.liasses3 a{float:left;width:140px;height:140px;background:url(img/impressions/liasses/3.png)}
.liasses3 a:hover{background:url(img/impressions/liasses/3_thumbs.png)}
.liasses4 a{float:left;width:140px;height:140px;background:url(img/impressions/liasses/4.png)}
.liasses4 a:hover{background:url(img/impressions/liasses/4_thumbs.png)}
.liasses5 a{float:left;width:140px;height:140px;background:url(img/impressions/liasses/5.png)}
.liasses5 a:hover{background:url(img/impressions/liasses/5_thumbs.png)}