var mehet=1;
function enable(){
     mehet=1;
}
function disable(){
     mehet=0;
}
function menuAnim(mit)
{
     
     var ul=$(mit);
     if(mehet){
          if (ul.style.display=="none")
          {
               new Effect.BlindDown(ul,{duration:0.8,beforeStart:disable,afterFinish:enable,transition: Effect.Transitions.spring});
          } else
          {
               new Effect.BlindUp(ul,{duration:0.3,beforeStart:disable,afterFinish:enable});
          }
     }
  
}