javascript新手提问

你好，我想些一个javascript，判断两次输入的账号一致，该如何做啊？
    <tr>
  <th width="18%" align="right">* 需要充值的账户 </th>
  <td width="82%"> <input name="txt_account" id="txt_account" size="60" value="" /> </td>
</tr>
<tr>
  <th align="right">* 重复输入账户 </th>
  <td> <input name="txt_raccount" id="txt_raccount" size="60" value="" /> </font> </td>
</tr>
<tr>
<th> </th>
<td height="50">
<input type="submit" name="sb_next" class="paysubmit" value="发送"  /> </td>
</tr>

---

<tr>
  <th width="18%" align="right">* 需要充值的账户 </th>
  <td width="82%"> <input name="txt_account" id="txt_account1" size="60" value="" /> </td>
</tr>
<tr>
  <th align="right">* 重复输入账户 </th>
  <td> <input name="txt_raccount" i