Please, can someone assist me? I am having an issue with my one-page checkout on `Magento CE v1.8.`

I am testing the checkout process and noticed that after selecting a shipping method the system fails to move onto the next step which is `"Payment Information"`. When I click on the `continue` button nothing happens and it remains on the shipping method tab.

I am new to Magento and still playing around with it so I wouldn't be surprised if it's a stupid setting or an overlooked issue because of my lack of experience with the system. 

But I read somewhere that it may be a JS error or something from the template.

The link is <http://beachandbeyond.co.za/shop> and any assistance would be appreciated.