.fond-haut {  background-attachment: fixed; background-image: url(images/charte_r4_c1.jpg); background-repeat: no-repeat; background-position: left top}
.fond-bas {  background-attachment: scroll; background-image: url(images/charte_r5_c1.jpg); background-repeat: repeat; background-position: left top}
.cadre {  border: #CC3333; border-style: double; border-top-width: thin; border-right-width: thin; border-bottom-width: thin; border-left-width: thin}