Reproducing Steps:

1. create and visit the zul below

   	<spreadsheet src="/TestFile2007.xlsx" maxrows="100" height="100%" width="100%" rowfreeze="0" columnfreeze="0"
   		maxcolumns="10">
   	</spreadsheet>
   

2. scroll to the last row and last column
3. cannot open inline editbox when double click top frozen area (ex: CV1) or left frozen area (ex: A1000) and no JavaScript error showed.