var fx;
window.addEvent('domready', function(){	
	fx = new Fx.Tween($('balloon_container'), {transition: 'bounce:out', duration: 1000});
	setMargin.periodical(4000);
});
function setMargin()
{
	var margin = $('balloon_container').getStyle('margin-left').toInt();
	if(margin >= -1512)
	{
		margin -= 378;
	} else
	{
		margin = 0;
	}
	fx.start('margin-left', margin);

}