判断给的style没有生效

     <c:forEach items="${messageList}" var="message" varStatus="status">
      <tr <c:if test="${status.index+1}%2 != 0"> style="background-color: red;"</c:if>>
       <td><input type="checkbox"/></td>
       <td>${status.index + 1}</td>
       <td>${message.command}</td>
       <td>${message.description}</td>
       <td>
        <a href="#">修改</a>&nbsp;&nbsp;&nbsp;
        <a href="#">删除</a>
       </td>
      </tr>
     </c:forEach>