Menudown = Class.create();

Menudown.prototype = {

  initialize: function(className, linkDown) {
    this.className = className;
    this.linkDown = linkDown;
    this.buttons = document.getElementsByClassName(this.className);
    this.links = document.getElementsByClassName(this.linkDown);
    this.setup();    
  },

  setup: function() {
    this.eventMouseDown = this.down.bindAsEventListener(this);         
    for(var i=0; i<this.buttons.length; i++)
    {
      Event.observe(this.buttons[i], "mousedown", this.eventMouseDown);
    }  
  },
  
  down: function(event) {
    $('imgDown').src="images/english-3.png";
    for(var i=0; i<this.links.length; i++)
    {
      this.links[i].style.visibility = "visible"; 
    }
  }  
}