function encadrer_bas_bouton(num){
//alert(num);
  if (num == 1)
  { 
   	jQuery("#bouton-encadrer-bas-1").addClass("bouton-encadrer-bas-1-selected");
   	jQuery("#bouton-encadrer-bas-2").removeClass("bouton-encadrer-bas-2-selected");
   	jQuery("#bouton-encadrer-bas-3").removeClass("bouton-encadrer-bas-3-selected");
	jQuery("#photos-encadrer-bas-2").hide();
   	jQuery("#photos-encadrer-bas-3").hide();
   	jQuery("#photos-encadrer-bas-1").show("slow");
 }
  else if (num == 2)
 {
   jQuery("#bouton-encadrer-bas-2").addClass("bouton-encadrer-bas-2-selected");
   jQuery("#bouton-encadrer-bas-1").removeClass("bouton-encadrer-bas-1-selected");
   jQuery("#bouton-encadrer-bas-3").removeClass("bouton-encadrer-bas-3-selected");
   jQuery("#photos-encadrer-bas-1").hide();
   jQuery("#photos-encadrer-bas-3").hide();
   jQuery("#photos-encadrer-bas-2").show("slow");
 }
else if (num == 3)
{
   jQuery("#bouton-encadrer-bas-3").addClass("bouton-encadrer-bas-3-selected");
   jQuery("#bouton-encadrer-bas-1").removeClass("bouton-encadrer-bas-1-selected");
   jQuery("#bouton-encadrer-bas-2").removeClass("bouton-encadrer-bas-2-selected");
   jQuery("#photos-encadrer-bas-2").hide();
   jQuery("#photos-encadrer-bas-1").hide();
   jQuery("#photos-encadrer-bas-3").show("slow");
}
}