1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
5 <title>无标题文档</title>
6 <script>
7 window.onload = function (){
8 var oBtn1 = document.getElementById('btn1');
9 var oBtn2 = document.getElementById('btn2');
10 var oBtn3 = document.getElementById('btn3');
11 var oBtn4 = document.getElementById('btn4');
12 var oP = document.getElementById('p1');
13 var num = 14;
14
15 oBtn1.onclick = function (){
16 num -= 2;
17 oP.style.fontSize = num + 'px';
18 // JS 不允许出现"-"
19 // padding-top paddingTop
20 // margin-left marginLeft
21 };
22 oBtn2.onclick = function (){
23 // num = num + 2;
24 num += 2;
25
26 oP.style.fontSize = num + 'px';
27 // JS 不允许出现"-"
28 };
29
30 oBtn3.onclick = function (){
31 // oP.class = 'red';
32 // class => className
33 oP.className = 'red';
34 };
35 oBtn4.onclick = function (){
36 // oP.class = 'red';
37 // class => className
38 oP.className = 'yellow';
39 };
40 };
41 </script>
42 <style>
43 .red { width:400px; border:10px solid #333; background:red; padding:20px; color:yellow; }
44 .yellow { width:500px; border:5px solid #333; background:yellow; padding:10px; color:red; }
45 </style>
46 </head>
47
48 <body>
49
50 <input id="btn1" type="button" value="-" />
51 <input id="btn2" type="button" value="+" />
52 <input id="btn3" type="button" value="红" />
53 <input id="btn4" type="button" value="黄" />
54 <p id="p1" style="font-size:16px;">10月28日晚，中央纪委监察部官网发布消息，贵州省委常委、遵义市委书记廖少华因涉嫌严重违纪违法接受组织调查。3天后中组部宣布对其免职。廖成为十八大后中纪委一连串"打虎"行动中第十一位落马的副省部级以上高官。</p>
55
56 </body>
57 </html>
