It's not as hard as you think, I also needed on when I was making a gaming website. Here's the code, all you need to do is replace some of the urls and such.
Code:
<a href="WHERE YOU WANT THE CURRENT WINDOW TO GO TO" onClick="window.open('WHERE YOU WANT THE NEW WINDOW TO GO TO', 'WindowA', 'width=550,height=550,scrollbars=no resizeable=no');">
<h2 align="center"><img src="YOURIMAGE" height="150" width="150" style="border: 4px solid #666666;" alt="Myimage">
</font></a><br><br>