Place this code anywhere in your profile.
<style type="text/css"> a:link img {filter:none;} a:visited img {filter:none;} a:hover img {filter:xray();} a:hover img { filter: xray; }</style><a href="http://www.freeskullylayouts.com" target="_blank">I tweaked my profile at FreeSKULLYLayouts.com</a><br><br>