这段javascript怎么写,急

Question

<script language="javascript">
function aaa()
{
    document.getElementById("tab1").style.display='block';
}
<table border="0" width="67%" id="table1" align="center">
<tr>
<td width="100%">
<p align="right"><input type="button" value="确定" name="ok" onclick="aaa();"></p>
</td>
</tr>
</table>
<table border="1" width="67%" align="center" id="tab1" name="tab1"   style="DISPLAY: none">
<tr>
<td width="50%">原有纪录</td>
<td width="50%"><input type="text" name="yyjl"></td>
</tr>
</table>

Answer 1

<input type="button" value="确定" name="ok"onclick="javascirpt:document.getElementByName('tabl').style.display='block'">

Answer 2

<div id="div_tb" style="display:none" >
<table border="1" width="67%" align="center" name="tab1"  >
    <tr>
    <td width="50%">原有纪录</td>
    <td width="50%"><input type="text" name="yyjl"></td>
  </tr>
  </table>
</div>
<script language='javascript'>
function display()
{
document.all("div_tb").stytle.display="";
}
</script>