jQuery plugin to move elements to top or bottom of parent

moveToTop.js

/**
 * Move an element to the top of the stack by appending it to the end
 * of its parent. 
 * 
 * The element, and its siblings, should be positioned in parent so that
 * they're stacked on top of each other. 
 */
(function ($) {
    $.fn.moveToBottom = function () {
        return this.parent().prepend(this);
    };
    $.fn.moveToTop = function () {
        return this.parent().append(this);
    }
})(jQuery);