<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg" onload="init()">
    <script type="text/ecmascript"><![CDATA[
        function init()
        {
            var polyline = document.createElementNS("http://www.w3.org/2000/svg", "polyline");
            var polygon = document.createElementNS("http://www.w3.org/2000/svg", "polygon");
            if (polyline == "[object SVGPolylineElement]" &&
                polygon == "[object SVGPolygonElement]") {
                document.getElementById("passed").setAttribute("fill", "green");
            }
        }
     ]]></script>
    <rect id="passed" x="0" y="0" width="100" height="100" fill="red"/>
</svg>