iframe 可以包含页面,是行内块元素可以设置宽高 ,frameborder="0"去除边框
<style>
iframe {
margin: 100px;
width: 1200px;
height: 500px;
}
</style>
</head>
<body>
<a target="aaa" href="./dashboard.html">dashboard</a>
<a target="aaa" href="./index.html">index</a>
<a target="aaa" href="./login.html">login</a>
<a target="aaa" href="./score.html">score</a>
<a target="aaa" href="./student.html">student</a>
<!-- src属性,指定要包含的页面 -->
<iframe name="aaa" src="./dashboard.html" frameborder="0"></iframe>
</body>
