function svgCursorCoords(e, d) {
  var pt;
  d = d || svgNode(e);
  if(!d || !d.createSVGPoint || !d.getScreenCTM) {
    return [e.clientX,e.clientY];
  }
  pt = d.createSVGPoint(); pt.x = e.clientX; pt.y = e.clientY;
  pt = pt.matrixTransform(d.getScreenCTM().inverse());
  return [pt.x,pt.y];
}