You could use and configure the Back Button to create a link to any web page you like.
Alternatively (and for users of SimpleViewer-Standard who do not have access to the Back Button Pro Option), you could overlay an HTML hyperlink on top of the gallery by inserting the following code into the <body> section of your gallery's HTML index page (changing the values as desired).
<div id="overlay" style="position: absolute; top: 10px; left: 10px; z-index: 99;"><a href="http://www.example.com/index.html">Click here</a></div>
Please note that if using this method, you will need to ensure that your gallery's background is transparent. Please see this FAQ for details.
SimpleViewer Support Team