I need a persistent popup (like tooltip but persistent)

I need a persistent popup (like tooltip but persistent)

I want what I call a "persistent popup".

Here is what I need:

When clicking a certain link (with an `onclick` handler or like this), there should appear a popup (similar to a tooltip) with HTML content which I provide.

The popup does NOT close when I just move the mouse. To close the popup we click outside it.

It is desirable that the popup is displayed with an arrow pointing to the link with `onclick` clicking which opened the popup.

Is there a plugin for this?

If no, I am willing to develop it myself, but my CSS design skills are not very strong.