js实现当鼠标移到表格上时显示这一格全部内容的代码

<style>    #showbox {      width: 150px;      min-height: 50px;      font: 100 14px/1 "微软雅黑";      border: 1px solid #3c8dbc;      display: none;      position: absolute;      top: 0;      left: 0;      background-color: #fff;      padding: 5px;    }  </style>

<table id="example1" role="grid">  <thead style="background-color: #E4E9F0;">  <tr role="row">    <th rowspan="2" style="text-align: center; width: 6%;" class="sorting_disabled " colspan="1"><font style="font-weight:bold;">序号</font></th>    <th rowspan="2" style="text-align: center; width: 10%;" class="sorting_disabled " colspan="1"><font style="font-weight:bold;">名称</font></th>    <th rowspan="2" style="text-align: center; width: 10%;" class="sorting_disabled " colspan="1"><font style="font-weight:bold;">类别</font></th>    <th rowspan="2" style="text-align: center; width: 8%;" class="sorting_disabled" colspan="1"><font style="font-weight:bold;">单位</font></th>    <th rowspan="2" style="text-align: center; width: 26%;" class="sorting_disabled " colspan="1"><font style="font-weight:bold;">成果要求</font></th>    <th colspan="2" style="text-align: center; " rowspan="1"><font style="font-weight:bold;">进展</font></th></tr>  <tr role="row">    <th style="text-align: center; width: 30%;" class="sorting_disabled" rowspan="1" colspan="1"><font style="font-weight:bold;">最新进展</font></th>    <th style="text-align: center; width: 10%;" class="sorting_disabled " rowspan="1" colspan="1"><font style="font-weight:bold;">更新时间</font></th></tr>  </thead>  <tbody>  <tr role="row">    <td>1</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td></td>  </tr>  <tr role="row">    <td>2</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td></td>  </tr>  <tr role="row" class="odd">    <td>3</td>    <td>阿拉蕾</td>    <td>阿拉蕾</td>    <td>阿拉蕾,</td>    <td>阿拉蕾</td>    <td></td>  </tr>  </tbody></table><div id="showbox"></div>

$(function() {    function showBox(obj,box){      var timer = null;      $(obj).on("mouseover", function (e) {        clearTimeout(timer);        var clientX = e.clientX;        var clientY = e.clientY;        var txt = $(this).text();        timer = setTimeout(function () {          console.log(clientX, clientY);          $(box).css("left", clientX).css("top", clientY);          if (txt == "") {            $(box).hide();          } else {            $(box).show();            $(box).html(txt);          }        }, 1000);      });      $(obj).on("mouseout",function(){        clearTimeout(timer);        $(box).hide();      });    }    showBox("#example1 > tbody td","#showbox");  });