Linking comments to chapters in a document/web pages

Hey there

for demonstrations sake, i feel that it would be
good to be able to view a link in the comments field
that pops up when you run your pointer over a
specific variable or flow etc.
This link could take the observer to the relevant page/chapter/web page
that documents and describes that section in detail and the reason for
its existence etc..

i have too much to say to put the text/explanatory graphs in the popup box as it would make the box too big and annoying.

is there a way to have a link in this box?
eg, www.thismodel/growthmodel/growthrate.....etc

hope you know what im trying to say/do.

LS