帮忙！急。。。帮帮新人关于分页

a.xml
<?xml version="1.0" encoding="UTF-8"?>
<students>
  <stu id="001">
    <name>zs</name>
    <sex>boy</sex>
    <age>18</age>
    <>90</>
  </stu>
  <stu id="002">
    <name>ls</name>
    <sex>girl</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="003">
    <name>w5</name>
    <sex>boy</sex>
    <age>42</age>
    <>59</>
  </stu>
  <stu id="004">
    <name>aa</name>
    <sex>boy</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="005">
    <name>bvv</name>
    <sex>boy</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="006">
    <name>dd</name>
    <sex>boy</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="007">
    <name>ee</name>
    <sex>boy</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="008">
    <name>uhh</name>
    <sex>girl</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="009">
    <name>kk</name>
    <sex>girl</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="010">
    <name>ii</name>
    <sex>girl</sex>
    <age>23</age>
    <>78</>
  </stu>
  <stu id="011">
    <name>cv</name>
    <sex>boy</sex>
    <age>23</age>
    <>78</>
  </stu>
</students>翻页.htm
<html>
<head>
    <title>Untitled Page</title>
</head>
<body>
    <xml id="stuxmldso" src="a.xml">
    </xml>
    <table datasrc="#stuxmldso" border="1" width="500" datapagesize="3" id="tb1">
        <thead>
            <td>
                编号</td>
            <td>
                姓名</td>
            <td>
                性别</td>
            <td>
                年龄</td>
            <td>
                成绩</td>
        </thead>
        <tr>
            <td>
                <span datafld="id"></span>
            </td>
            <td>
                <span datafld="name"></span>
            </td>
            <td>
                <span datafld="sex"></span>
            </td>
            <td>
                <span datafld="age"></span>
            </td>
            <td>
                <span datafld=""></span>
            </td>
        </tr>
    </table>
  <br>&nbsp;&nbsp;&nbsp;&nbsp; 
    
    <a href=# onclick="f1()">首页</a>
    <a href=# onclick="f2()">上一页</a>
    <a href=# onclick="f3()">下一页</a>
    <a href=# onclick="f4()">尾页</a>
   
  
  <script>
  function f1()
  {
    tb1.firstPage();
  }
  function f2()
  {
    tb1.previousPage();
  }
  function f3()
  {
    tb1.nextPage();
  }
  function f4()
  {
    tb1.lastPage();
  }
  </script>  
</body>
</html>