You can essentially whip up your own.
Make a div with a unique ID in your HTML code, with everything you want to show in your tooltip. Then apply the display:none CSS.
Then for your target, use onclick attribute to trigger your javascript to use the getElementById() function and apply the display:block CSS.
For the close button, use another target span or div inside of the parent div of your tooltip with another onclick attribute to apply display:none to the parent div again.