Conditional Alternate Row Shading
http://spreadsheetpage.com/index.php/tip/alternate_row_shading_using_conditional_formatting/
Formula: =MOD(ROW(),2)=0
Conditional Alternate Row Shading
http://spreadsheetpage.com/index.php/tip/alternate_row_shading_using_conditional_formatting/
Formula: =MOD(ROW(),2)=0