Java, anyone?

Hello:wavey:

And no, I'm not talking about coffee. I mean Java Script.

Does anybody here know much Java or HTML? I'm making a website for a friend and he (ordered?) asked me to place a prank in it. I have to make a button that when the user pushes, it displays a popup. When the user clicks OK, another popup has to appear, but with different writing, otherwise I'd use a a loop statement. It has to do this roughly 15 times without pause before the popups dissapear! It might seem like a tastless joke, but it's just a private site that you need a password to get in with so only about 6 of us will get pranked. It's an insiders joke... But anyway, How can I achieve this?:isadizzy::costumes::costumes: