"i got to asp image buttons" Is this different somehow than an html image button?
If not, the first piece of code I posted will do that. Did you try it?
<input border="0" src="imgpic1.gif" name="I1" type="image" onmouseover="this.src='imgpic2.gif'" onmouseout="this.src='imgpic1.gif'" >
You would have to do that for both buttons.