Interspire Addon Program

I need an addon written for my Interspire shopping cart that allows me to hide or show all of my products (make visible/invisible) at the click of a button. Should be very very easy to make, probably no more than 1/2 hours Visible/invisible values are stored in mySQL database as 0 or 1. So just make them all 0 or all 1. Easy peasy. Also, this must be written to be very simple to use, pushbutton and go. Will review all cheap solutions.