我可以检测浏览器的“书签"工具栏是否已启用JavaScript吗?

我有一个书签，我的用户一直在单击它，而不是先将其拖动到书签栏中.我想添加一个动画，该动画将响应单击书签而运行，并说将我拖到您的书签栏！"并显示指向该栏的漂亮箭头.

I have a bookmarklet, and my users are consistently clicking it instead of dragging it to their bookmarks bar first. I'd like to add an animation which would run in response to a click on the bookmarklet, say "Drag me to your bookmarks bar!" and show a nifty arrow pointing at the bar.

但这仅在浏览器的书签栏实际可见时才有意义.我可以使用JavaScript检测书签栏是否可见吗?

But that only makes sense if the browser's bookmarks bar is actually visible. Can I detect whether the bookmarks bar is visible using JavaScript?