uses of Photoshop in asp.net.

Question

I m creating my page layout in photoshop  and save this as "save for web...." by this an html file and images folder created.
But my problem is that how can we make link button in photoshop?
Means when i create menu images then in html file it work as a picture not as button.
how can we do this that it work as a button in photoshop?