Vanilla 2

I have a problem implementing prettyphoto with a youtube video popup.

Every time you click the link you briefly see the popup before the page continues to the youtube link in the anchor's href attribute.

I can get it to work on a static html page, but I'm trying to implement it in a .NET site. I've tried adding the js and css links in the head of masterpage and in the body of the .aspx page and both produced the same results.

It works fine with photos though.

Any thoughts as to why it's not stopping the linked URL from loading?

Thanks,