Internet Explorer
click Tools, select Internet Options, choose Security, choose Internet zone, click Custom Level, scroll to Scripting, set Active scripting to Enable then click OK.

Google Chrome
click the spanner icon to the right of the address bar, click Options, click Under The Bonnet, click Content Settings, click Allow all sites to run JavaScript then click the Tab for this page at the top of Chrome.

click Tools, select Options, choose the Content tab, tick the Enable JavaScript box then click OK.

press F12 to open Quick Preferences then click Enable JavaScript.

click the cog icon to the right of the address bar, click Preferences, select the Security tab, click Enable JavaScript then close the Security window.

Then refresh this page by pressing F5 or pressing your browser's refresh button, or go back and click the link again to begin.