I don't know it myself, I just know it exists.
Mhmm, it's a little more complicated than that. You have to put a div or table over the image and then place a transparent image over it. I'll get you the exact code to put in, gimme a sec.
Edit:
<div align="left">
<div style="overflow:auto;position:relative;width:91px;height:41px;top:92px;left:171px;margin-right:-91px;margin-bottom:-41px;">
<a href="URLOFOKBUTTONHERE"><img src="http://i28.tinypic.com/24n0iyt.jpg"></a>
</div>
<div style="overflow:auto;position:relative;width:92px;height:42px;top:92px;left:38px;margin-right:-92px;margin-bottom:-42px;">
<a href="URLOFCANCELBUTTONHERE"><img src="http://i28.tinypic.com/24n0iyt.jpg"></a>
</div>
<img src="http://i28.tinypic.com/nl4qx1.jpg" alt=""></div>The only parts that need replacing are the two URLs. This SHOULD work, I didn't test it though.