SVG images are interactive

Images created with the `image` JME function were all marked as
non-interactive. But SVG images have an event listener attached to the
'load' event to do variable substitution, so they must be considered
interactive.

Author: christianp

runtime/scripts/jme-builtins.js

@@ -364,7 +364,10 @@ newBuiltin('image',[TString, '[number]', '[number]'],THTML,null, {
         }
         var subber = new jme.variables.DOMcontentsubber(scope);
         var element = subber.subvars(img);
-        element.setAttribute('data-interactive', 'false');
+
+        // The subber replaces SVG images with <object> tags which have an event listener for when the content loads, so they must be considered interactive.
+        element.setAttribute('data-interactive', element.tagName.toLowerCase() == 'object');
+
         return new THTML(element);
     }
 });

runtime/scripts/jme-variables.js

@@ -804,7 +804,6 @@ DOMcontentsubber.prototype = {
             return element;
         } else if(tagName=='img') {
             if(element.getAttribute('src').match(/.svg$/i)) {
-                element.parentElement
                 var object = element.ownerDocument.createElement('object');
                 for(var i=0;i<element.attributes.length;i++) {
                     var attr = element.attributes[i];