Dynamic height

Is there anyway to dynamicly change the height of the grid based on the number of rows?
The data is being obtained from xml. I can get the number of rows of data in the grid, but I am unable to get the height of the grid. The grid height is not being set anywhere else.

You can set the style for the grid to 100% (e.g., obj.setStyle('height', '100%');), but I have found that it doesn't work correctly with version 2.0.