Website loads and then crashes

This problem only happens with one particular website however it is infuriating, particularly when looking to buy presents.

When accessing the asos webpage (www.asos.com) it loads, however, when I go further into the website and click on another page it goes blank or has small writing in the top right corner saying quick view loading or it has a small circle.

I have reformatted the computer as well as have taken it to Apple to make sure it isn't a virus, and this has been confirmed.

Any suggestions on what to do?

Occurs in both Safari and Google Chrome, the latest versions. Also have the latest flash player downloaded - v22. I am using a macbook air if that helps.

If anyone could help, it would be greatly appreciated.