How to reference context variable $rxs_navbase inside EditLive editor

Hi All,

I’ve got HHS/NIEHS looking for a way to reference context variable $rxs_navbase inside EditLive editor. They want to use images in the web_resources folder which is defined by the context variable $rxs_navbase inside the EditLive control. Their question is as follows:
Is there a way to let Active Assembly know to replace the $rxs_navbase variable based on the contexts Preview or Published?

Thanks in Advance,
Dan