// 如果不設定這個，JS程式碼中的按鈕會顯示，但是按下去卻不彈出對話方塊
        // Sets the chrome handler. This is an implementation of WebChromeClient
        // for use in handling JavaScript dialogs, favicons, titles, and the
        // progress. This will replace the current handler.
        myWebView.setWebChromeClient(new WebChromeClient()
        {

            @Override
            
 
public boolean onJsAlert(WebView view, String url, String message,
                    JsResult result)
            {
                // TODO Auto-generated method stub
                return super.onJsAlert(view, url, message, result);
            }

        });