#zona_interactiva #block_zi_2 #boto_encendre{ width:151px; height:35px;}
#zona_interactiva #block_zi_2 #boto_encendre a {width:151px; height:35px; display:block; background-image:url(../img/boto_cat.png); background-position:0 0; background-repeat:no-repeat;}
#zona_interactiva #block_zi_2 #boto_encendre a:hover { background-position:0px -35px;}
#zona_interactiva #block_zi_2 #boto_encendre a.selected { background-position:0px -70px; cursor:default;}