bootstrap 工具提示问题请教

Question

<div class="well">
    <p class="muted" style="margin-bottom: 0;">
    Alibaba Group makes it easy for anyone to buy or sell online anywhere in the world. It is a family of Internet-based businesses that includes online marketplaces that facilitate business-to-business international and domestic China trade, retail and payment platforms, shopping search engine and distributed cloud computing services. In July 2012, Alibaba Group adjusted its core business into seven business groups, namely Alibaba International Business Operations, Alibaba Small Business Operations, <a href="#" rel="tooltip" title="Taobao Marketplace - China's popular C2C online shopping destination">Taobao</a> Marketplace, <a href="#" rel="tooltip" title="Tmall.com - China's B2C shopping destination with an extensive selection of quality brands and authentic products">Tmall.com</a>, Juhuasuan, eTao and Alibaba Cloud Computing, to foster the development of an open, collaborative and prosperous e-commerce ecosystem.
</div>

看demo应该可以得到黑色的工具提示。不过效果出不来，成下面效果：

Answer 1

能改变他弹出的颜色不

Answer 2

自己解决了。。

        <script type="text/javascript">
            $(document).ready(function(){
                    $('.tooltip-demo.well').tooltip(
                        {
                         selector: "a[rel=tooltip]"
                        });
                                                        
            });
            
            function showtest01()
            {
                $('#tooltip_test01').tooltip('toggle');
                $('#tooltip_test02').tooltip('toggle');
            }
            
        </script>