Set a Link on a mouseover image?

I have a hotspot on an image and am wondering that when the mouse hovers over the hotspot and loads another image, is there a way that javascript can apply the link to the image popping up besides the hotspot?

<area shape="poly" coords="307,241,255,316,156,403,100,451,7,582,59,656,224,535,357,426,449,354,344,251" href="BKSSLdenali_body.php" alt="BKSSL 15Watt/25Watt 3in body offers a modular component design. " onmouseover="MM_swapImage('powerofx','','images/BKSSL31525watt3inbody.jpg',1)" onmouseout="MM_swapImgRestore()" />