1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="utf-8">
5 <title></title>
6 <style>
7 #div1 button{width: 100px; height: 30px; background-color: gray; color: white; font-size: 18px;}
8 #div1 .active{background-color: orange; color: blue;}
9 #div1 div{width: 440px; height: 300px; border: 1px solid black; display: none;}
10 </style>
11 <script>
12 window.onload=function(){
13 var oDiv1=document.getElementById("div1");
14 var aBtns=oDiv1.getElementsByTagName("button");
15 var aDivs=oDiv1.getElementsByTagName("div");
16
17 for(var i=0;i<aBtns.length;i++){
18 aBtns[i].index=i;
19 aBtns[i].onclick=function(){
20 for(var j=0;j<aBtns.length;j++){
21 aDivs[j].style.display='none';
22
23 aBtns[j].className='';
24 }
25 aDivs[this.index].style.display='block';
26 this.className="active";
27 }
28 }
29
30 }
31
32
33 </script>
34 </head>
35 <body>
36 <div id="div1">
37 <button class="active">HTML5</button>
38 <button>Python</button>
39 <button>Java</button>
40 <div style="display: block;">H5H5H5H5H5H5H5H5H5H5H5H5H5H5H5</div>
41 <div>PythonPythonPythonPythonPythonPythonPython</div>
42 <div>JavaJavaJavaJavaJavaJavaJavaJavaJava</div>
43 </div>
44 </body>
45 </html>