iframe内のHTMLを動的に生成する - NO!と言えるようになりたい

メモ

元ネタ http://webos-goodies.jp/archives/51014876.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
    <script type="text/javascript">
        function write2frame() {
            var iframe = document.createElement('IFRAME');
            document.getElementById('blog_test').appendChild(iframe);

	    text = '<html><head></head><body onload="parent.hello(this)"><div id="hello"/></body></html>';

            var doc = frames[frames.length - 1].document;
            doc.open();
            doc.write(text);
            doc.close();
        }

        function hello(doc) {
            hello = doc.document.getElementById("hello");
            hello.innerHTML = "Hello!";
        }
    </script>
    <meta name="Content-Type" content="text/html;charset=UTF-8" />
    <title>タイトルです</title>
    <meta http-equiv="Content-Style-Type" content="text/css" />
    <meta http-equiv="Content-Script-Type" content="text/javascript" />
</head>
<body>
    <div id="blog_test"/>

    <a href="javascript:void(0)" onmousedown="write2frame()">click!</a>
</body>
</html>