<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="runTest()">
<path id="bar" d="M150 50 L 450 50" />
<text>
<textPath id="theTP" xlink:href="#foo">PASS</textPath>
</text>
<script><![CDATA[
function runTest() {
var path = document.getElementById("bar");
path.setAttribute("id","foo");
}
]]></script>
</svg>