Sideshow is a powerful javascript library which aims to reduce your user's learning curve by providing a way to create step-by-step interactive tours. Explain the features of your application, control your end-user's interaction with your UI, emphasize what you're explaining in each step by masking it. Just think! The sky is the limit!
If complete condition is evaluated true it activates button, but when it is set false, it doesn't disable it.