var menuItem = Class.create({
  initialize: function(btnName,menuName) {
  	$(btnName).observe('click', function(event){
  									if (opened_menu === false){
  										opened_menu = null;
  									}
  									if (opened_menu && opened_menu != menuName){
											Effect.BlindDown(menuName,{duration:.5,delay:.3});
											$(btnName).className = 'sezioneAttiva';
										}else if(!opened_menu){
											Effect.BlindDown(menuName,{duration:.5});
											$(btnName).className = 'sezioneAttiva';
											$(clicked_btn).className='none';
										}
  									if (opened_menu){
											Effect.BlindUp(opened_menu,{duration:.5});
											$(clicked_btn).className='none';
											if (opened_menu == menuName){
												opened_menu = false;
											}
										}
										if (opened_menu !== false){
											opened_menu = menuName;
										}
										clicked_btn = btnName;
									});
  }
});