// Equalize column heights
var max = 0;
$('#list, #of, #elements').each(
	function(){
		max = Math.max( max, $(this).height() );
	})
	.css({
		'height': max
	});

// Equalize column heights
var tallest = 0;
$('#list, #of, #elements')
	.each(function(){
		var thisHeight = $(this).outerHeight();
		if (thisHeight > tallest) tallest = thisHeight;
	})
	.css({
		'overflow': 'auto',
		'height': tallest
	});

// Equalize column heights
var tallest = 0;
$('#list, #of, #elements')
	.each(function(){
		var thisHeight = $(this).height();
		if (thisHeight > tallest) tallest = thisHeight;
	})
	.css({
		height: thisHeight
	});

// Equalize column heights
var tallestColumnHeight = 0;
$('#list, #of, #elements')
	.each(function(){
		var thisColumnHeight = $(this).height();
		tallestColumnHeight = (thisColumnHeight >= tallestColumnHeight) ? thisColumnHeight : tallestColumnHeight;
	})
	.css({
		height: tallestColumnHeight
	});

There isn't really anything here that others haven't already accomplished in plugin form. I needed something simple that could be easily stored, retrieved, and reused.

Equalize column heights

jQuery