.fondbarre {  background-attachment: fixed; background-image: url(barre_fond.gif); background-repeat: no-repeat; background-position: right top}
.fondimeub {  background-attachment: fixed; background-image: url(fond_imeub.jpg); background-repeat: no-repeat; background-position: left bottom}
.fondhistor {  background-attachment: fixed; background-image: url(fond_historique.jpg); background-repeat: no-repeat; background-position: 20px bottom}
.fondmessage {  background-attachment: fixed; background-image: url(fond_message.jpg); background-repeat: no-repeat; background-position: 20px bottom}