#contenus{background: url('../img/motif_page2.gif') no-repeat right top;}

#menu1 {background: url('../img/menu_pourquoi.gif') no-repeat;}
#menu2 {background: url('../img/menu_comment1.gif') no-repeat;}
#menu3 {background: url('../img/menu_autres.gif') no-repeat;}
#menu4 {background: url('../img/menu_offres.gif') no-repeat;}