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2<head><script type="text/javascript">
3<![CDATA[
4
5  function boom() {
6    const HTML_NS = "http://www.w3.org/1999/xhtml";
7    var tr4 = document.createElementNS(HTML_NS, 'tr');
8    document.getElementById('tbody1').appendChild(tr4);
9    var span1 = document.createElementNS(HTML_NS, 'td');
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11    document.documentElement.removeAttribute("class");
12  }
13
14  function ol(e) {
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16    setTimeout(boom, 400);
17  }
18
19  window.addEventListener("load", ol);
20
21]]>
22</script>
23</head>
24
25<body><table><tbody id="tbody1"><tr><td rowspan="0"></td></tr></tbody></table></body>
26</html>
27