Subversion-Projekte lars-tiefland.cienc

(function ($) {

    $.fn.selectChain = function (options) {

        var defaults = {

            key: "id",

            value: "label"

        };

        var settings = $.extend({}, defaults, options);

        if (!(settings.target instanceof $)) settings.target = $(settings.target);

        return this.each(function () {

            var $$ = $(this);

            $$.change(function () {

                var data = null;

                if (typeof settings.data == 'string') {

                    data = settings.data + '&' + this.name + '=' + $$.val();

                } else if (typeof settings.data == 'object') {

                    data = settings.data;

                    data[this.name] = $$.val();

                }

                settings.target.empty();

                $.ajax({

                    url: settings.url,

                    data: data,

                    type: (settings.type || 'get'),

                    dataType: 'json',

                    success: function (j) {

                        var options = [], i = 0, o = null;

                        for (i = 0; i < j.length; i++) {

                            // required to get around IE bug (http://support.microsoft.com/?scid=kb%3Ben-us%3B276228)

                            o = document.createElement("OPTION");

                            o.value = typeof j[i] == 'object' ? j[i][settings.key] : j[i];

                            o.text = typeof j[i] == 'object' ? j[i][settings.value] : j[i];

                            settings.target.get(0).options[i] = o;

                        }

			// hand control back to browser for a moment

			setTimeout(function () {

			    settings.target

                                .find('option:first')

                                .attr('selected', 'selected')

                                .parent('select')

                                .trigger('change');

			}, 0);

                    },

                    error: function (xhr, desc, er) {

                        // add whatever debug you want here.

			alert("an error occurred");

                    }

                });

            });

        });

    };

})(jQuery);