调试易

<script>
function checkDegree(){
  tab2.style.display = (document.myform.Degree[0].checked) ? "block" : "none";
  tab3.style.display = (document.myform.Degree[0].checked) ? "block" : "none";
}
</script>
<form name="myform">
<table border="1">
 <tr class="tdbg"> 
            <td width="137" height="30" align="right"><strong>学位证书：</strong></td>
            <td height="25" colspan="3"> <input type="radio" name="Degree" value="1" onclick="checkDegree()">
              有&nbsp; <input name="Degree" type="radio" value="0" onclick="checkDegree()">
              无 </td>
          </tr><tr class="tdbg" id="tab2" style="display:none ">            <td height="30" align="right"><span class="style1">学位名称：</span></td>
            <td width="287" height="27"><input name="DegreeName" type="text"  id="DegreeName" size="30"></td>
            <td width="75"><div align="right" class="style1">院校名称：</div></td>
            <td width="459"><input name="Academy" type="text" id="Academy" size="30"></td></tr>
          
<tr class="tdbg" id="tab3" style="display:none ">
            <td height="30" align="right"><span class="style1">学费：</span></td>
            <td height="27"><input name="Tuition" type="text" id="Tuition" size="10"></td>
            <td height="27"><div align="right" class="style1">学制：</div></td>
            <td height="27"><input name="Length" type="text" id="Length" size="10"></td>
</tr>
</table>
</form>