Tell a friend Email Link

I have had a look through the site bu can’t find anything about this.

I would like to have a feature on my page which allows a client to fill in the email address of a friend they think would like the site - then press send. In the background Flash would send a pre-created email about the site to whoever’s email address is in the box.

I have no idea how to do this but realise it is very common - I have a sneaky feeling it might involve php - I would like to avoid this if possible as I have no experience with php - but would love some guidance towards achieving this however it needs to be done.

Thanks as always