No Default Product in Add to cart form... Is it possible?

I am trying to create a logic where there is not by default product selected when a user views a product display. Currently if a product display has variations attached, by default the first one is chosen as the default product.

I want user to actually select a variation. And if he fails to do so, a message display "Please select size/color" should be displayed as error.

Posted: Apr 7, 2012