function fixHeight() {
	tall = ($('skinny').getHeight() > $('copy').getHeight())
		? $('skinny').getHeight()
		: $('copy').getHeight();
	$('skinny','copy').each(function(e) {
		e.setStyle({height: tall + 'px'});
	});
}

Event.observe(window, 'load', function() { fixHeight(); });