<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" onload="runTest()">
<path id="thePath" d="M-150 50 L 450 50" />
<pattern id="pat" patternUnits="userSpaceOnUse" x="0" y="0" width="200" height="200">
<text>
<textPath id="theTP" xlink:href="#thePath">PASS</textPath>
</text>
</pattern>
<rect width="200" height="200" fill="url(#pat)" stroke="black" stroke-width="1"/>
<script><![CDATA[
function runTest() {
var tp = document.getElementById("theTP");
tp.setAttribute("startOffset", "200");
}
]]></script>
</svg>