Changing An Option On Product Page, Causes Freeze

Not sure what is wrong with my product page, but when selecting an option such as "color". After selecting a color, the product image will load but the page will freeze at this moment. The loading wheel will after freeze.

Anyone got any ideas?

Check it out here

I see 3 javascript errors on your website:
Most possibly they are the reason on the issue. Ask your developer to fix these issues at first