>It's a little complex when link are generated by 
Javascript 
>code because the start_tag is not the html tag which embed 
>the link but a <script> tag.

Hummm.. there's no workaround for the moment. Javascript 
link callback is really a pain in the neck, and i'll have 
to find something clean for that.. maybe by sending a 
standard "script" tag ? But this won't help in some cases..