Randomize Child Elements

randomize.js

$.fn.randomize = function(selector, callback) {
    var $elems = selector ? $(this).find(selector) : $(this).children(),
        $parents = $elems.parent();

    $parents.each(function() {
        $(this).children(selector).sort(function() {
            return Math.round(Math.random()) - 0.5;
            // }). remove().appendTo(this); // 2014-05-24: Removed `random` but leaving for reference. See notes under 'ANOTHER EDIT'
        }).detach().appendTo(this);
    });

    callback && callback();

    return this;
};