方法1

<iframe   src="规定在 iframe 中显示的文档的 URL" width="" height=""   frameborder="1/0"  name="iframe名称"     scrolling="yes/no/auto">   
</iframe>

方法2

<!DOCTYPE html>
<html lang="en">
<head>
     <meta charset="UTF-8">
     <title>Main Page</title>
</head>
<body>
     <span>This is main page.</span>
     <iframe frameborder="0"
             noresize="noresize"
             style="position: absolute; background: transparent; width: 100%; height:100%;"
             src="https://www.baidu/"
             frameborder="0">
     </iframe>

</body>
</html>

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