Calling addslashes_js for $navbits[lastelement]?

[reismarktq2]

Need some serious help with this one:

I'm working on a hack that dynamically creates bookmark links on each page of the forums, and the code breaks whenever it runs into a subforum or thread with an apostrophe in the title. I need to run addslashes_js on $navbits[lastelement] in order to solve this issue, but putting this:

$booktitle = addslashes_js($navbits[lastelement]);

in a plug-in at the global_start location does nothing.

Anyone?

EDIT: Figured it out. Thanks for the no help.