     
     func webView(_: WKWebView, didFinish: WKNavigation!) {
         print("Test Web page loaded \(reference.toString())")
-        self.execJavascript(message: Note.testWalkPage2)
+        let message = "getClass(document.body);\n"
+        self.execJavascript(message: message)
     }
     
     func webView(_: WKWebView, didFail: WKNavigation!, withError: Error) {

        + "    node = node.previousSibling;\n"
        + "  }\n"
        + "}\n"

        + "function findVerseNum(node) {\n"
        + "  if (node.nodeType === 1 && node.nodeName !== 'A') {\n"
        + "    var id = node.getAttribute('id');\n"

        let configuration = WKWebViewConfiguration()
        configuration.preferences.javaScriptEnabled = true
        let js = Note.decodeRange + Note.installEffect + Note.encodeRange + Note.showHideSSFootnote
            + Note.findVerseNum
        let script = WKUserScript(source: js, injectionTime: .atDocumentStart, forMainFrameOnly: false)
        let contentController = WKUserContentController()
        contentController.addUserScript(script)
