window.addEvent('domready', function() {
									 
	var ml = $('mainleft');
	var mc = $('maincenter');
	var mr = $('mainright');
	var mls = $('mainleft-shadow');
	var mrs = $('mainright-shadow');
	
	var sizeML = ml.getSize();
	var sizeMC = mc.getSize();
	var sizeMR = mr.getSize();
	var challenge = Math.max(sizeML.y, sizeMC.y);
	challenge = Math.max(challenge, sizeMR.y);
	
	ml.setStyle('height', challenge);
	mc.setStyle('height', challenge);
	mr.setStyle('height', challenge);	
	mls.setStyle('height', challenge-sizeML.y);
	mrs.setStyle('height', challenge-sizeMR.y);

});