jQuery 学习手册

$.fn.advancedPlugin = function(options) {
    var defaults = {
        speed: 500,
        easing: 'swing',
        callback: null
    };
    var opts = $.extend({}, defaults, options);

    return this.each(function() {
        var $this = $(this);
        $this.animate({ opacity: 0 }, opts.speed, opts.easing, function() {
            if ($.isFunction(opts.callback)) {
                opts.callback.call(this);
            }
        });
    });
};