.rideau {
	background-attachment: fixed;
	background-image: url(http://www.lagareauxsorcieres.ch/Images/rideau_final.jpg);
	background-repeat: repeat;
	background-position: left top;
}
.rid {
	background-image: url(http://www.lagareauxsorcieres.ch/Images/rideau_final.jpg);
}