<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");
  });