.fondtheo {
	background-attachment: fixed;
	background-image: url(theo/imtheo/fontheo.gif);
	background-repeat: no-repeat;
}
.fonfmarg {
	background-attachment: fixed;
	background-image: url(institut/iminst/foninst.gif);
	background-repeat: no-repeat;
}
.fondmusic {
	background-attachment: fixed;
	background-image: url(music/imusic/fonmus.gif);
	background-repeat: no-repeat;
}