add social bookmark script to products page

[keylesslocks]

I want to add this code to all the products pages

<a href="javascript:window.location = 'http://www.socialmarker.com/?link='+encodeURIComponent (location.href)+'&title='+encodeURIComponent( document.title);"><img src= "http://www.socialmarker.com/bookmark.gif" border="0" /></a><noscript><a href="http://www.socialmarker.com" >Social Bookmarking</a></noscript>

any idea or page where I should do this?

thanks,

Eric