修改评论的方法

<script>    function CheckPl(obj)    {    if(obj.saytext.value=="")    {    alert("您没什么话要说吗？");    obj.saytext.focus();    return false;    }    return true;    }    </script>      <div class="commentsList"><table width="95%" border="0" align="center" cellpadding="3" cellspacing="0">       <form action="[!--news.url--]e/enews/index.php" method="post" name="saypl" id="saypl" onSubmit="return CheckPl(document.saypl)">        <tr>         <td>用户名：<input name="username" type="text" class="inputText1" id="username" value="" size="20" /></td>         <td style="display:none;"><input name="nomember" type="checkbox" id="nomember" value="1" checked="checked" /></td>        </tr>        <tr>          <td>            <textarea name="saytext" cols="80" rows="3" id="saytext" class="inputText2"></textarea></td>        </tr>       <tr>          <td><script src="[!--news.url--]d/js/js/plface.js"></script></td>        </tr>        <tr>         <td><input name="imageField" type="image" src="/e/data/images/postpl.gif" border="0" /><input name="id" type="hidden" id="id" value="[!--id--]" /><input name="classid" type="hidden" id="classid" value="[!--classid--]" /><input name="enews" type="hidden" id="enews" value="AddPl" /><input name="repid" type="hidden" id="repid" value="0" /><input type="hidden" name="ecmsfrom" value="[!--titleurl--]"></td>        </tr>       </form>      </table>     </div>