trying SVG check that Modernizr uses, to fix Firefox 3.6 problems

core/js/js.js

@@ -180,7 +180,7 @@ if (!Array.prototype.indexOf){
  * check if the browser support svg images
  */
 function SVGSupport() {
-	return document.implementation.hasFeature("http://www.w3.org/TR/SVG11/feature#BasicStructure", "1.1") || document.implementation.hasFeature("http://www.w3.org/TR/SVG11/feature#Shape", "1.0");
+	return !!document.createElementNS && !!document.createElementNS('http://www.w3.org/2000/svg', "svg").createSVGRect;
 }
 
 /**