function hideMenu(){
	//document.getElementById("menuLayer").style.visibility = "hidden";
	
	var layer = document.getElementById("menuLayer");
	layer.style.top = "0px";
	
	JSTweener.addTween(layer.style, {
        time: 2,
        transition: 'easeOutCubic',
        top: -200
      });
	
}

function showMenu(){
	//document.getElementById("menuLayer").style.visibility = "visible";
	var layer = document.getElementById("menuLayer");
	
	layer.style.top = "-200px";
	JSTweener.addTween(layer.style, {
        time: 2,
        transition: 'easeOutCubic',
        top: 0
      });
}