How to change page Background and Font Color by clicking a button? : <p>I'm specifically trying to achieve the front end result of the blue button in the demo here:</p>

<p><a href="http://www.codelifter.com/main/javascript/colorbuttons.shtml" rel="nofollow noreferrer">http://www.codelifter.com/main/javascript/colorbuttons.shtml</a></p>

<p>How can this be achieved? I've tried the original code and get nothing at all.</p>

<p>Thank you for any help that you can provide.</p>
