var current = null;
var placeholder = null;

function init(){
  var elem = $('submenu');
  placeholder = current = $('placeholder');
  return new Scroller(elem,{velocity: 0.05, area: 100}).start();
}

function show_submenu(elem){
	if(current === elem){
	    elem = $('placeholder');
	}
	if(current !== null){
	    //current.toggleClass('hidden');
	    //current.toggleClass('nodisplay');
	    current.setStyles( {visibility: 'hidden', display: 'none'});
	}
	current = elem;
	if(current === placeholder){
	    current.setStyles( {visibility: 'hidden', display: 'inline'});
	} else {
	    current.setStyles( {visibility: 'visible', display: 'inline'});
	}
	//current.toggleClass('hidden');
	//current.toggleClass('nodisplay');
}

window.addEvent('domready', function() {
    init();
});