Can I trigger a PopUp with a call to action button?

I am doing an "Under Construction" page for a client and I would like to trigger a PopUp for readers to fill out a Mailing-list Opt-in with a button on the page. I just love the functionality and look of the PopUp and I don't want to navigate to some other page to display the form. Is there a way to set something on the page to cause the popup to trigger only when the Call To Action button is pressed?