SticiGui requires an up-to-date standards-compliant browser. I recommend Mozilla Firefox21.x or higher. Current versions of Safari and Google Chrome work with most of the materials. I do not recommend Microsoft Internet Explorer.
In summary, you need:
You need to make sure that JavaScript is "enabled" in your browser, not just that the software supports JavaScript. How to enable JavaScript and cookies depends on which browser you use; see the documentation or help for your browser.
Not only must your browser support JavaScript, but it must be enabled, and your browser needs to accept cookies from the originating server.