1 <html xmlns=
"http://www.w3.org/1999/xhtml" class=
"reftest-wait">
2 <head><script type=
"text/javascript">
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');
10 tr4
.insertBefore(span1
, null);
11 document
.documentElement
.removeAttribute("class");
15 window
.removeEventListener("load", ol
);
16 setTimeout(boom
, 400);
19 window
.addEventListener("load", ol
);
25 <body><table><tbody id=
"tbody1"><tr><td rowspan=
"0"></td></tr></tbody></table></body>