function showBar(id) 
{
	t1 = new Tween(document.getElementById(id).style,'top',Tween.strongEaseOut, -28, 0, 1, 'px');
	t2 = new OpacityTween(document.getElementById(id),Tween.strongEaseOut, 0, 100, 1);
	t1.start();
	t2.start();
}

function hideBar(id) 
{
	t1 = new Tween(document.getElementById(id).style,'top',Tween.strongEaseOut, 0, -28, 1, 'px');
	t2 = new OpacityTween(document.getElementById(id),Tween.strongEaseOut, 100, 0, 1);
	t1.start();
	t2.start();
}