.bw_ang_alto_sx {  background-image: url(finestra/bw_ang_alto_sx.jpg)}
.bw_ang_alto_dx { background-image: url(finestra/bw_ang_alto_dx.jpg)}
.bw_alto {  background-image: url(finestra/bw_alto.jpg); background-repeat: repeat-x}
.bw_basso { background-image: url(finestra/bw_basso.jpg); background-repeat: repeat-x }
.bw_ang_basso_dx { background-image: url(finestra/bw_ang_basso_dx.jpg)}
.bw_ang_basso_sx { background-image: url(finestra/bw_ang_basso_sx.jpg)}
.bw_laterale_dx {  background-image: url(finestra/bw_laterale_dx.jpg); background-repeat: repeat-y}
.bw_laterale_sx { background-image: url(finestra/bw_laterale_sx.jpg); background-repeat: repeat-y }