PHP 保存按钮点击无反应，菜鸟求关注求解答

<?php  include($_SERVER['DOCUMENT_ROOT']."/auth.php"); $sql="select * from bydms_news where news_id='$_REQUEST[id]'";$query=mysql_query($sql);$us= is_array($row=mysql_fetch_array($query));if ($us){?><form id="news_updata" method="post"><input id="news_id" name="news_id"  type="hidden" value="<?php echo $_REQUEST[id];?>" />  <div class="pageFormContent">	<fieldset>		<legend>添加项目公告</legend>	  		<dl class="nowrap">			<dt>公告名称：</dt>			<dd>            <input id="news_title" name="news_title" type="text" class="easyui-validatebox" data-options="required:true" value="<?php echo $row[news_title];?>"  />			</dd>		</dl>		<dl class="nowrap">			<dt>公告类型：</dt>			<dd>            <input id="news_type" name="news_type" type="text" class="easyui-validatebox" data-options="required:true" value="<?php echo $row[news_type];?>" />			</dd>		</dl>      <dl class="nowrap">	    <dt>操作人：</dt>			<dd>            <input id="news_auther" name="news_auther" class="easyui-validatebox" value="<?php echo $MY_CNNAME;?>" required readonly/>            </dd>		</dl>              <dl class="nowrap">      <dt>内容：</dt>			<dd><textarea id="news_content" name="news_content" cols="60" rows="10" ><?php echo $row[news_content];?></textarea></dd>      </dl>      </fieldset>  </div>   <div style="padding:5px;border:1px solid #ddd;" >     <table cellpadding="0" cellspacing="0" style="width: 100%">      <tr>       <td height="19">填写提醒：请认真填写各项，谢谢。</td>       <td style="text-align: right">       <a id="baocun2"  href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-save'" onclick="mysubmitform('news_updata','home/news/news_upa_data.php')">保存</a>       </td>     </tr>    </table>	</div> </form><?PHP }?>

<?phpinclude($_SERVER['DOCUMENT_ROOT']."/auth.php");//获取提交信息$news_id=$_POST[news_id];//公告ID$news_title=ereg_replace('[[:space:]]','',$_POST[news_title]);  //公告标题$news_content=ereg_replace('[[:space:]]','',$_POST[news_content]);  //公告内容$news_type=ereg_replace('[[:space:]]','',$_POST[news_type]); //公告类型$news_auther=ereg_replace('[[:space:]]','',$_POST[news_auther]); //操作人$news_date=mydate(); //时间$news_authernum=$MY_SYSNUMBER;//操作人编号//添加信息到数据库$sql_bydms_news_upa="update bydms_news set news_title='$news_title',news_content='$news_content',news_type='$news_type',news_date='$news_date',news_auther='$news_auther',news_authernum='$news_authernum' where news_id='$news_id'";//执行SQL语句mysql_query($sql_bydms_news_upa);//返回参数echo '{';echo '"success": true,'; echo '"messageid": "修改公告",';echo '"message": "修改公告成功！",'; echo '"icon": "question",';  echo '"myclose": "修改公告",'; echo '"myselect":"项目公告",'; echo '"mydatagui":"news_list",'; echo '"myrefresh":"home/news/news_list.php"'; echo '}';?>

//表单提交function mysubmitform(fromid,url){$('#'+fromid).form('submit', {	url:url,	onSubmit: function(){	    return $(this).form('validate');	},	success: function(data){ 	   var data = eval('(' + data + ')'); 	          $.messager.alert(data.messageid,data.message,data.icon);	   if(data.success){	   //关闭tab选项卡	   $('#centertab').tabs('close', data.myclose);  //关闭指定面板	   $('#centertab').tabs('select', data.myselect); //定位指定面板	   $('#' + data.mydatagui).datagrid('reload');  // reload the user data	   }    }});}