在Struts2中滚动

我想创建更多文本文件的div：

I want to create the div with more textfiled:

<s:div cssClass="div_position">
  <s:textfield  cssClass="position" id="position1" value=""  name="position1" ></s:textfield>
  <s:textfield  cssClass="position" id="position2" value=""  name="position2" ></s:textfield>
  <s:textfield  cssClass="position" id="position3" value=""  name="position3" ></s:textfield>
  <s:textfield  cssClass="position" id="position4" value=""  name="position4" ></s:textfield>
  <s:textfield  cssClass="position" id="position5" value=""  name="position5" ></s:textfield>
</s:div>

类div_position如下：

The class "div_position" is the follow:

.div_position{ height:50px; overflow-y:Scroll; }

它不工作，我只显示文本字段，

It doesn't work, I only display the textfields but outside the div. Someone can help me.