var limit_last_annonces_menu = 3;
var tot_last_annonces_menu; // A déterminer
var first_last_annonces = 1;
var last_last_annonces = 3;

$(document).ready( function (){
  // Gère l'affichage des boutons
  function NLA_LRButtons()
  {
    // gère l'affichage du bouton droit
    if ( tot_last_annonces_menu>limit_last_annonces_menu && last_last_annonces<tot_last_annonces_menu )
    { $("#but_lastannounce_navig_right").removeClass("but_right_inactive"); $("#but_lastannounce_navig_right").addClass("but_right"); }
    else
    { $("#but_lastannounce_navig_right").removeClass("but_right"); $("#but_lastannounce_navig_right").addClass("but_right_inactive"); }
    
    // gère l'affichage du bouton gauche
    if ( tot_last_annonces_menu>limit_last_annonces_menu && first_last_annonces>1 )
    { $("#but_lastannounce_navig_left").removeClass("but_left_inactive"); $("#but_lastannounce_navig_left").addClass("but_left"); }
    else
    { $("#but_lastannounce_navig_left").removeClass("but_left"); $("#but_lastannounce_navig_left").addClass("but_left_inactive"); }
  }
  
  $("#but_lastannounce_navig_right").click(function(){
    if ( last_last_annonces<tot_last_annonces_menu )
    {
      // incrémente les menus
      last_last_annonces+=1; first_last_annonces+=1;
      
      // ajuste tous les menus
      $("#last_announces_bloc").animate({"left": "-=290px"}, "normal", "easeOutQuart", NLA_LRButtons());
    }
  });
  
  $("#but_lastannounce_navig_left").click(function(){
    if ( first_last_annonces>1 )
    {
      // décrémente les menus
      first_last_annonces-=1; last_last_annonces-=1;
      
      // ajuste les menus
      $("#last_announces_bloc").animate({"left": "+=290px"}, "normal", "easeOutQuart", NLA_LRButtons());
    }
  });
  
  NLA_LRButtons();
});