jQuery Equal Columns Plugin

/**
 *
 * Copyright (c) 2007 Tom Deater (http://www.tomdeater.com)
 * Licensed under the MIT License:
 * http://www.opensource.org/licenses/mit-license.php
 * 
 */
 
(function($) {
 /**
  * equalizes the heights of all elements in a jQuery collection
  * thanks to John Resig for optimizing this!
  * usage: $("#col1, #col2, #col3").equalizeCols();
  */
  
 $.fn.equalizeCols = function(){
  var height = 0;
  
  return this
   .css("height", "auto")
   .each(function() {
    height = Math.max(height, this.offsetHeight);
   })
   .css("height", height)
   .each(function() {
    var h = this.offsetHeight;
    if (h > height) {
     $(this).css("height", height - (h - height));
    };
   });
   
 };
 
})(jQuery);