Since I am not sure about the anchor, left it as is in the common tpl_main_page.php
The javascript I put in includes/templates/CUSTOM/jscript/on_load/on_load_comodocorner.js, without the script tags.
It didn't work.
However, it did work if I put it back in the template, with the script tags.
I am testing on a local demo site, without any other mods installed.
Any developer listening? DrByte?