1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="utf-8" />
5 <style type="text/css">
6 body,
7 html {
8 margin: 0;
9 padding: 0;
10 }
11 body>div {
12 position:absolute;
13 top:100px;
14 left:100px;
15 width: 100px;
16 height: 120px;
17 margin: 15px;
18 padding: 20px;
19 border: 10px solid brown;
20 overflow: scroll;
21 }
22 body>div>div {
23 height: 416px;
24 background: yellow;
25 }
26 p{
27 margin: 0;
28 }
29 </style>
30 <title>title</title>
31 </head>
32 <body>
33 <div>
34 <div>
35 <p>**********</p>
36 <p>**********</p>
37 <p>**********</p>
38 <p>**********</p>
39 <p>**********</p>
40 <p>**********</p>
41 <p>**********</p>
42 <p>**********</p>
43 <p>**********</p>
44 <p>**********</p>
45 <p>**********</p>
46 <p>**********</p>
47 </div>
48 </div>
49 <script>
50 var oDiv = document.getElementsByTagName("div")[0];
51 oDiv.scrollTop = oDiv.scrollHeight/2;
52 console.log(oDiv.offsetHeight); //180:height+padding+border;
53 console.log(oDiv.clientHeight); //143:padding+height-滚动条(17);
54 console.log(oDiv.scrollHeight); //456:padding+全部内容高度;
55 console.log(oDiv.scrollTop); //228:可见内容顶部到全部内容顶部的距离;
56 </script>
57 </body>
58 </html>
盒子模型图：
其中，83和103为width和height减去滚动条宽度的值；
