.bouton_gauche_debut_l {background-image:url('../images/navs/composants/57_1_1.png');width:10px;height:26px;}
.bouton_gauche_debut_c {background-image:url('../images/navs/composants/57_1_2.png');height:26px;}
.bouton_gauche_debut_r {background-image:url('../images/navs/composants/57_1_3.png');width:10px;height:26px;}
.bouton_gauche_milieu_l {background-image:url('../images/navs/composants/57_2_1.png');width:10px;height:26px;}
.bouton_gauche_milieu_c {background-image:url('../images/navs/composants/57_2_2.png');height:26px;}
.bouton_gauche_milieu_r {background-image:url('../images/navs/composants/57_2_3.png');width:10px;height:26px;}
.bouton_gauche_fin_l {background-image:url('../images/navs/composants/57_3_1.png');width:10px;height:26px;}
.bouton_gauche_fin_c {background-image:url('../images/navs/composants/57_3_2.png');height:26px;}
.bouton_gauche_fin_r {background-image:url('../images/navs/composants/57_3_3.png');width:10px;height:26px;}