$(document).ready(function(){
  // DEBUT du menu
  var menuToShow = null;
  var menuToHide = null;
  var timeout = null

  function manageMenu()
  {
    if (menuToHide != null)
    {
      $('.sub_main_menu', $(menuToHide)).hide();
      $(menuToHide).removeClass('hover');
      menuToHide = null;
    }

    if (menuToShow != null)
    {
      $('.sub_main_menu', $(menuToShow)).show();
      $(menuToShow).addClass('hover');
      menuToHide = menuToShow;
      menuToShow = null;
    }
  }

  function enableMenu() {
    $('#main_menu_id > ul > li').hover(
      function(){
        menuToShow = this;
        window.clearTimeout(timeout);
        timeout = window.setTimeout(manageMenu, 0);
      },
      function(){
        window.clearTimeout(timeout);
        timeout = window.setTimeout(manageMenu, 550);
      }
    );
  }

  window.setTimeout(enableMenu, 1000);
  // FIN du menu
});