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视频链接
视频
代码：
50-History.html：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>History</title>
<script type="text/javascript">
window.onload=function(){
var btn01=document.getElementById("btn01");
btn01.onclick=function(){
history.back();
}
var btn02=document.getElementById("btn02");
btn02.onclick=function(){
history.forward();
}
}
</script>
</head>
<body>
<h1>History</h1>
<button id="btn01">back</button>
<button id="btn02">forward</button>
</body>
</html>
50_01test.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<h1>test01</h1>
<a href="50_02test.html">去02</a>
</body>
</html>
50_02test.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test_02history</title>
<script type="text/javascript">
</script>
</head>
<body>
<h1>去history</h1>
<a href="50-History.html">去history</a>
</body>
</html>
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