Orderfy - jQuery plugin

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/**   
 * Licensed under the MIT license. 
 * https://opensource.org/licenses/MIT 
 * 
 * Orderfy - jQuery plugin
 * @author .Maui 
 * @link https://dotmaui.com/ 
 * @version 0.3 
 * @desc A small script that sorts DOM elements within common parent. 
 */

(function($) {
    $.fn.orderBy = function(orderby, _options) {
        var defaults = {
            order: "asc",
            parent: null,
            onTopIfValue: null,
            onBottomIfValue: null,
            isOrderedByAttr: false
        };
        var options = $.extend(defaults, _options);
        var elements = [];
        var elements_top = [];
        var elements_bottom = [];
        var is_all_numeric = true;
        var $parent = (options.parent == null) ? $(this).parent() : options.parent;
        $(this).each(function() {
            var order_value;
            if ($.trim(orderby) == "") {
                order_value = $(this).text();
            } else if (options.isOrderedByAttr) {
                order_value = $(this).find(orderby).attr(orderby.substr(1, orderby.length - 2));
            } else {
                order_value = $(this).find(orderby).html();
            }
            order_value = $.trim(order_value);
            if (options.onTopIfValue != null && options.onTopIfValue == order_value) {
                elements_top.push({
                    element: $(this),
                    value: order_value
                });
            } else if (options.onBottomIfValue != null && options.onBottomIfValue == order_value) {
                elements_bottom.push({
                    element: $(this),
                    value: order_value
                });
            } else {
                if (isNaN(order_value)) {
                    is_all_numeric = false;
                }
                elements.push({
                    element: $(this),
                    value: order_value
                });
            }
        });
        if (options.order == "asc") {
            if (is_all_numeric) {
                elements.sort(function(a, b) {
                    return a.value - b.value;
                });
            } else {
                elements.sort(function(a, b) {
                    if (a.value < b.value) return -1;
                    if (a.value > b.value) return 1;
                    return 0;
                });
            }
        } else if (options.order == "desc") {
            if (is_all_numeric) {
                elements.sort(function(a, b) {
                    return a.value - b.value;
                });
            } else {
                elements.sort(function(a, b) {
                    if (a.value > b.value) return -1;
                    if (a.value < b.value) return 1;
                    return 0;
                });
            }
        }
        __DetachAppend(elements_top, $parent);
        __DetachAppend(elements, $parent);
        __DetachAppend(elements_bottom, $parent);
    };

function __DetachAppend(elements, $parent) {
        $(elements).each(function() {
            var elm = $(this)[0].element;
            $(elm).detach().appendTo($parent);
        });
    }
})(jQuery);