var maxHeight = function(classname) {

var divs = document.getElements('div.' + classname);

var max = 0;

divs.each(function(div) {

	max = Math.max(max, div.getSize().size.y);

});

//divs.setStyle('height', max);

return max;

}

window.addEvent('load', function() {

maxHeight('eqal');

maxHeight.delay(500, maxHeight, 'equal');

});