Bootstrap实现选择输入框

Using Bootstrap to implement dropdown inside of text input

使用要求，必须包含以下文件（Bootstrap.v3，jquery版本不限）
1. ```
bootstrap.min.css
```
2. ```
jquery-2.1.4.min.js
```
3. ```
bootstrap.min.js
```
示例
代码

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4     <meta charset="utf-8">
 5     <title>Basic Bootstrap Template</title>
 6     <meta name="viewport" content="width=device-width, initial-scale=1">
 7     <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
 8 <style type="text/css">
 9   input.input-append{
10     float: left;
11     /* "plug in" the dropdown button */
12     margin-right: -34px;
13   }
14   
15   input.input-append + button.btn{
16       float:none;
17   }
18   
19   div.input-append{
20     display:block;
21   }
22   
23   ul.input-append {
24   /* inflating drop menu */
25      min-width: 100%;
26   }
27 </style>
28     <script src="js/jquery-2.1.4.min.js"></script>
29     <script src="js/bootstrap.min.js"></script>
30 </head>
31 <body>
32 <div class="container">
33 <div class="row">
34  <form class="form form-horizontal">
35   <div class="form-group">
36     <label for="usedfor" class="col-sm-2 control-label">用途</label>
37     <div class="col-sm-4">
38       <div class="input-append btn-group">
39           <input type="text" class="input-append form-control" name="usedfor" id="usedfor" placeholder="报销用途">
40           <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">
41               <span class="caret"></span>
42               <span class="sr-only">Toggle Dropdown</span>
43           </button>
44           <ul class="input-append dropdown-menu">
45               <li><a href="#">过路费</a></li>
46               <li><a href="#">办公用品</a></li>
47               <li><a href="#">业务招待费</a></li>
48               <li role="separator" class="divider"></li>  
49               <li><a href="#">差旅费</a></li>              
50           </ul> 
51       </div>
52     </div>
53   </div>
54     <div class="form-group">
55     <label for="inputPassword3" class="col-sm-2 control-label">对照</label>
56     <div class="col-sm-10">
57       <input type="password" class="form-control" id="inputPassword3" placeholder="Password">
58     </div>
59   </div>
60 </form>   
61 </div>
62 </div>
63 <script>
64 $(document).ready(function(){
65     $("[href=\'#\']").click(function(){
66         $("ul.dropdown-menu").siblings("input").val($(this).html());
67     });
68 });
69 </script>
70 </body>
71 </html>