var maxHeight = function(classname) {
	var divs = document.getElements('div.' + classname);
	var max = 0;
	divs.each(
			function(div) {
				
				
					
			max = Math.max(max, div.getSize().y);
			}
	);
	divs.setStyle('height', max);
	return max;
}
window.addEvent('load', function() {
	maxHeight('equal');
	maxHeight.delay(500, maxHeight, 'equal');
}
);