javascript dialog box

[Shacks]

I'm new to actinic and would like to add some code to my add to cart button, I would like a dialog box to pop up when a customer adds a product to cart, it would read "This product has been added to your cart". I have found some javascript to acheive this but I do not know how to carry out the task. Thanks in advance, Shacks.

[RuralWeb]

Actinic by default takes the customer to thier shopping cart every time a product is added so you dont really need this feature - it will also be blocked by most browsers set to block popups.