另类ToolTip

完整代码实现，请留言，或者发信给我。
  <table width="768">
                            <tr>
                                <td id="left" width="200">
                                        <a title="精选旅游"
                                            href="http://www.163.com">网易</a>
                                </td>
                                <td width="100%">
                                    <table width="100%">
                                            <a style="cursor: hand" onclick="displayleft(this,'left')">框架转换</a>
                                    </table>
                                </td>
                            </tr>
                    </table>