Jsp 单选按钮不来了

这是一个非常基本的问题。我在jsp页面中创建了两个单选按钮。按钮即将出现，但用户可以选择两个按钮。它不是单选按钮。这是我的jsp代码

 <div class="list list2" id = "userPreference">
         <div id= "preferenceResultMessage"></div>
         <input type="radio" name="sortByPrice" value=""/> <span class="text">Sort by Price </span>
         <input type="radio" name="sortByTime" value=""/>  <span class="text">Sort by Delivery time</span>
         <input type="submit" name="submit" class="submit" value="Submit" onclick = "loadPreference()" />
        </div>

---

要链接单选按钮，它们需要具有相同的名称属性。例如：

<div id= "preferenceResultMessage"></div>
         <input type="radio" name="sortBy" value=""/> <span class="text">Sort by Price </span>
         <input type="radio" name="sortBy" value=""/> <span class="text">Sort by Delivery time</span>
         <input type="submit" name="submit" class="submit" value="Submit" onclick = "loadPreference()" />
 </div>

你可以