I'm trying to display a png image on a
You could use input type image.
<input type="image" src="http://example.com/path/to/image.png" />
It works as a button and can have the event handlers attached to it.
Alternatively, you can use css to style your button with a background image, and set the borders, margins and the like appropriately.
<button style="background: url(myimage.png)" ... />