Hi Robert,
Your idea of using Grid Layout is superb, but pulling in a tab strip is not a sign of good design. I would suggest you to use 2 PANELS in each Cell - one below the other (refer to the Image "PANELS"). So, In the FIRST_PANEL --> Put your CROSSTAB
In the SECOND_PANEL (should be below your First Panel)--> Put your indicator light .
This is how all your cells; layout should be !
Please note that : Initially Set the VISIBILITY of the FIRST_PANEL --> False..
Now, in the onClick event of the INDICATOR_LIGHT , write the script
SECOND_PANEL.setVisibility("false");
FIRST_PANLE.setVisibility("true");
The above script will help show the CROSSTAB when you click on the INDICATOR_LIGHT.
Hope this helps.
BR
Gowtham S