         function jsFallbackFromCDN(libname_to_check, localFilename) {
              var parts = libname_to_check.split('.')
              if (((parts.length == 1) && (typeof window[parts[0]] == "undefined")) ||
                  ((parts.length == 2) && (typeof window[parts[0]][parts[1]] == "undefined"))) {
                  console.log(`***Failed to load ${localFilename} from CDN. Falling back to local offline version.***`);
                  document.write(unescape(`%3Cscript src="./offline/${localFilenam