variable from a web site

[Jacques Hausser]

I'm a total newbie with browsers and worse, totally blind-and-deaf to Java. My problem is I want to pick coordinates and elevation in a LC stack from
http://www.daftlogic.com/sandbox-google-maps-find-altitude.htm
just by clicking on the map.
I was (surprisingly) able to get a browser working in my stack. Now, the results are apparently available as a CSV list in a variable 'outputDIV', defined as : var outputDiv=document.getElementById('outputDiv');
How to get this variable automatically after a click on the map ?
Many thanks in advance !

Jacques