1<html xmlns="http://www.w3.org/1999/xhtml">
2
3<head>
4<script>
5
6var SVG_NS = "http://www.w3.org/2000/svg";
7
8function boom()
9{
10  var svgElem = document.createElementNS(SVG_NS, "svg");
11  var ellipse = document.createElementNS(SVG_NS, "ellipse");
12
13  svgElem.setAttribute("viewBox", "0 0 30 40");
14  document.body.appendChild(svgElem);
15  document.body.appendChild(ellipse);
16  ellipse.appendChild(svgElem);
17  svgElem.removeAttribute("viewBox");
18}
19
20</script>
21</head>
22
23<body onload="boom()">
24
25</body>
26
27</html>
28
29