[Chameleon] popup from rectangle

[Ken-ichi]

Hi again.  I'm trying to make a query-like widget that pops up a results 
window based on a point OR a rectangular selection on the map.  The 
Query widget seems to handle the point by just opening up a new window 
and passing it the values in the form variables MAP_CURSOR_POS_X and 
MAP_CURSOR_POS_Y.  I've been doing my newbie best to sift through the 
code and find out how the corner coord. of that DHTML rubber-band box 
gets translated into form variables before the form is submitted by 
something like ZoomIn, but to no avail.  Can anyone tell me how one 
accesses both coordinate pairs for a rubber-band box with JavaScript?

-Ken-ichi