WebPlus X4: Notified by email when user clicks button

Hi there,

I am product testing something at the moment. I have a webpage and a buy it now button next to the item in question. This is what I want: when the user registers their interest by clicking the buy button, they then see a page with a message saying the item is sold out but they will be notified when it's back in stock if they leave their email add. (I know how to do all that). But I would like to be notified every time someone has clicked the buy button. Is there a way I can do this? I know how to make a button and have that go through to a different page when it is clicked, but I don't know how to somehow add a form in to it so I am emailed every time someone clicks the button?

Thanks for any help :)