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向页面输出表达式并清除

Posted on 2011-03-29 08:35  yjss  阅读(181)  评论(0)    收藏  举报 
<body>
<script language="javascript" type="text/javascript">
    document.write("<h1>Hello</h1>");
    document.write("<h1>Hello</h1>");

    document.writeln("<h1>Hello</h1>");
    document.writeln("<h1>Hello</h1>");
</script>
    <p>
        <input id="Button1" type="button" value="button" onclick="document.body.innerHTML = '';" /></p>
</body>