[RESOLU] jquery bug : is not a function

           
var main_affiche = $("#main_affiche") ;
    
// main vertical scroll
  if ( main_affiche.size() > 0 )
      {  
                   main_affiche.scrollable({
          // basic settings
          vertical: true,
            size: 1,
           clickable: false,
          // items are auto-scrolled in 2 secnod interval
               interval: 3000,
               
              // when last item is encountered go back to first item
                loop: true, 
         
      
           // up/down keys will always control this scrollable
            keyboard: 'static',
     
           // assign left/right keys to the actively viewed scrollable
            onSeek: function(event, i) {
               horizontal.scrollable(i).focus();
          }
     
       // main navigator (thumbnail images)
       }).navigator("#main_affiche").autoscroll();
     
       // horizontal scrollables. each one is circular and has its own navigator instance
     var horizontal = $(".scrollable_affiche").scrollable({size: 1}).circular().navigator(".navi_affiche");
    
      
       // when page loads setup keyboard focus on the first horzontal scrollable
horizontal.eq(0).scrollable().focus();
       }
                         
                              
      
  
});