/*
 * jQuery shuffle
 *
 * Copyright (c) 2044 Tolpeit Stefan <www.tolpeit.it>
 */
 
(function ($) {
    $.fn.shuffle = function (opts) {
        opts = jQuery.extend({
            orderby: '',
            descending: false,
            valuetype: 'int'
        }, opts || {});
        return this.each(function () {
            var items = $(this).children().clone(true);
            return (items.length) ? $(this).html($.shuffle(items, opts)) : this;
        });
    }

    $.shuffle = function (arr, opts) {
        for (var j, x, i = arr.length; i; j = parseInt(Math.random() * i), x = arr[--i], arr[i] = arr[j], arr[j] = x);
        arr.sort(function compare(a, b) {
            if (opts.valuetype == "int") {
                if (opts.descending)
                    return parseInt($(a).attr(opts.orderby)) < parseInt($(b).attr(opts.orderby)) ? 1 : -1;
                return parseInt($(a).attr(opts.orderby)) > parseInt($(b).attr(opts.orderby)) ? 1 : -1;
            }else {
                if (opts.descending)
                    return $(a).attr(opts.orderby) < $(b).attr(opts.orderby) ? 1 : -1;
                return $(a).attr(opts.orderby) > $(b).attr(opts.orderby) ? 1 : -1;
            }
        });
        return arr;
    }
})(jQuery);