选择checkbox显示隐藏内容

http://bbs.blueidea.com/thread-2851297-1-1.html

客户类别：	普通会员 VIP会员
VIP卡号：

<SCRIPT language=javascript1.2>
function showsubmenu(sid,s){
  whichEl = document.getElementById("submenu" + sid);
  if (s==0){
    whichEl.style.display="";
  }
  else{
    whichEl.style.display="none";
  }
}
</SCRIPT>
<table>
<tr>
<td height="30" bgcolor="#FFFFFF"><div align="right">客户类别：</div></td>
                <td bgcolor="#FFFFFF">&nbsp;
                  <input name="c_sort" type="radio" value="1" checked id=menuTitle1 onClick="showsubmenu(2,this.value)">
                  普通会员
                  <input type="radio" name="c_sort" value="0" id=menuTitle1 onClick="showsubmenu(2,this.value)"> 
                  VIP会员</td>
              </tr>
              <tr bgcolor="#EAEAEA" style="display:none" id='submenu2'>
                <td height="30"><div align="right">VIP卡号：</div></td>
                <td><font size="2">
                  &nbsp;
                  <input name="vipcard" type="text" id="vipcard" size="35" onkeyup="this.value=this.value.replace(/[^\d]/g,'')" onpaste="return false">
                </font></td>
                </tr>
</table>