.tdbg {  background-attachment: fixed; background-image:  url(../barranavigazione/fotogramma_base_sx.jpg); background-repeat: repeat-y; background-position: left top}
.tdbgCopy { background-attachment: fixed; background-image:  url(../barranavigazione/fotogramma_base_dx.jpg); background-repeat: repeat-y; background-position: left top }