通过事件实现
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<button onclick="dian">点我一下</button>
<a href="3.16-02.html">访问3.16-02.html</a>
<button onclick="_forward()">前进</button>
<button onclick="_load()">刷新</button>
<script>
function _forward(){
window.history.forward();
}
function _load(){
window.location.reload();
}
</script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<button onclick="_back()">回退</button>
</body>
</html>
