counter

I need a javascript counter finished in one day to use with my paypal purchase buttons. I need something that I can put around the paypal forum information in html and put in a number. When the button is clicked that many times the button will change out and be disabled. I will need that for a one and two button feature. Some items I have two buttons for different prices but it will need to keep track of how many times either button is pressed. Finally when the item is sold out it will also need to change out the picture of the item being sold so the picture has a sold out sign on it. This will need to be code that is easy for me to put around any button or set of buttons and in the code it should be easy for me to see where I need to write the src links for the different pictures. In other words I will need directions on where to put each piece of information in my html code. For further information on my set up you can see the page here [login to view URL]