html部分：
1 <ul>
2 <li>
3 <input type="radio" name="radio" id="tab1" checked>
4 <label for="tab1">选项一</label>
5 <div class="content">内容一</div>
6 </li>
7 <li>
8 <input type="radio" name="radio" id="tab2">
9 <label for="tab2">选项二</label>
10 <div class="content">内容二</div>
11 </li>
12 <li>
13 <input type="radio" name="radio" id="tab3">
14 <label for="tab3">选项三</label>
15 <div class="content">内容三</div>
16 </li>
17 <li>
18 <input type="radio" name="radio" id="tab4">
19 <label for="tab4">选项四</label>
20 <div class="content">内容四</div>
21 </li>
22 <li>
23 <input type="radio" name="radio" id="tab5">
24 <label for="tab5">选项五</label>
25 <div class="content">内容五</div>
26 </li>
27 </ul>
1 <ul>
2 <li>
3 <input type="r
