div.light_square .pp_close{background:url(../images/prettyPhoto/light_square/sprite_sc.png) -1px -1px no-repeat;}

div.light_square .pp_next:hover{background:url(../images/prettyPhoto/light_square/btnNext_sc.png) center right no-repeat;}
div.light_square .pp_previous:hover{background:url(../images/prettyPhoto/light_square/btnPrevious_sc.png) center left no-repeat;}