function request() {
	var ajax = new Ajax.PeriodicalUpdater(
		'callout',
		'/app/callout',
		{
			onSuccess: function() {
				Element.setStyle('callout', {height: '100%'});
				new Element.show('callout');
				new Effect.Highlight('callout');
			},
			frequency: 120
		}
	);
}

function fixColumnHeight() {
	var mainHeight = Element.getHeight('main');
	var sidebarHeight = Element.getHeight('sidebar');

	if (mainHeight >= sidebarHeight) {
		Element.setStyle('wrapper', {backgroundColor: '#CC9'});
	}
	else {
		Element.setStyle('wrapper', {backgroundColor: '#FFF'});
	}
}