Hello Marc,
Possible improvment for your newlisp-js IDE here:
http://newlisp.neocortex.io/
When nothing is selected in the Input area, the Manual button should link to:
http://www.newlisp.org/downloads/manual_frame.html
When text is selected (for example println) then call:
http://www.newlisp.org/downloads/newlisp_manual.html#println
Then we have context-help.
(Not sure if this is supported by textarea)
Some discussion here:
http://stackoverflow.com/questions/275761/how-to-get-selected-text-from-textbox-control-with-javascript
Regards