How do I show/hide a hyperlink in Dreamweaver?

Lemme explain. For my Intro to Web Design class we're using Dreamweaver, HTML, and currently Javascript. Now, I want to be a piece of shit and Rick Roll my class by making a Site with a link that leads to NGGYU, and then as soon as its clicked have another link show up on the website that was hidden thats the ACTUAL website I made for class. I did the thing were I press Window, Behaviors, Add, but Show/Hide isn't letting me use it and I've tried to highlight different parts of it but to no avail. Help me Rick Roll my class please