Equalize dimensions of a set of elements

Array.equalize.js

/* Equalizes dimensions of selected elements.
 *
 * els.equalize();
 *
 * Example:
 * 
 * $$('.boxes').equalize('height', 'max', 20);
 * $$('.boxes').equalize('width', 'min');
 * $$('.boxes').equalize('height'); 
 *
 * Author: Oskar Krawczyk (oskar dot krawczyk dot com after nouincolor)
 */

Array.implement({  
	equalize: function(dir, mode, offset) {
		var dir = $pick(dir, 'height');
		var axis = dir == 'height' ? 'y' : 'x';
		maxHeight = [];

		this.each(function(el) {
			maxHeight.push(el.getSize()[axis]);
		});
		
		this.setStyle(dir, Math[$pick(mode, 'max')].apply(Math, maxHeight) + $pick(offset, 0));
	}
});