Is it possible to use "dinamic" ImageButtons in ASP.NET web application??

Question

Hi, I would like to use some ImageButtons in my ASP.NET web application, but I saw that the button looks the same all the time. With the normal Buttons, the appereance is changed if the user clicks on it, or also if he passes the mose across it. Consequently, you can see if the button is pressed or selected, but it is not possible to add pictures on it. My question was if there is any way to change the ImageButtons when 1) they are being clicked or 2) selected. I thought about making new pictures (for the clicked or selected button) and then change the image url just when these events are occuring. How can I now when a button is being pressed or selected?? Thanks, goraperas