rewrite1.js

(function($) {
  var max_height = 0;
  $("div.col").each(function(){
    var height = $(this).height();
    if (height > max_height)
      max_height = height;
  }).height(max_height);
})(jQuery);

rewrite2.js

(function($) {
  var col = $("div.col");
  var max_height = Math.max.apply(null, col.map(function() {
    return $(this).height();
  }));
  col.height(max_height);
})(jQuery);

rewrite3.js

(function($) {
  $("tr:odd, li:odd").addClass("odd"); 
})(jQuery);