HTML5 - SVG Rectangle

Following is the HTML5 version of an SVG example which would draw a rectangle using <rect> tag:

<!DOCTYPE html>
<head>
<title>SVG</title>
<meta charset="utf-8" />
</head>
<body>
<h2>HTML5 SVG Rectangle</h2>
<svg id="svgelem" height="200" xmlns="http://www.w3.org/2000/svg">
<rect id="redrect" width="300" height="100" fill="red" /> </svg>
</body>
</html>

This would produce following result in HTML5 enabled latest version of Firefox.