тоже самое таблицей + время ... Internet Explorer может не показать - как повезёт )))
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
<script language="JavaScript" type="text/javascript">
function brush() {
var start = new Date();
for (var a = document.createElement("table"), b = 256; b--;)
for (var d = a.insertRow(0), c = 256; c--;)
d.insertCell(0).style.cssText = "background-color: rgb(" + b + ",0," + c + ");width: 1px; height: 1px;";
a.cellSpacing = "0";
a.cellPadding = "0";
document.body.appendChild(a);
var time = document.createTextNode((new Date()).getTime() - start.getTime()+"ms");
document.body.appendChild(time);
};
brush();
</script>
</body>
</html>