Hiding Every n-th Coloumn in a crosstab

Hi,

I am hoping smeone can help me with a CSS formatting problem I am having with a crosstab table.

I currently have data in a BEX query that is both displaying a value to be displayed in the crosstab and a value that with be used to control the background colour of the ajacent cell. To make this a little more complicated, both of these cells are also grouped by month.

I really want to be able to use a CSS class to hide all the 'FLAG' columns, so every other column in this case.

If I remove the column from the data source, the conditional formatting does not work, so I believe this has to be done in CSS.

I have read this article,

http://scn.sap.com/community/businessobjects-design-studio/blog/2014/07/28/sap-design-studio--showinghiding-crosstab-columns-with-measures-with-css-and-scripting

as a starting point, but the added complexiticy of the monthly grouping and the fact i want to to hide every other column is cuasing me real problems

As always, any help is gratefully recieved.

Thanks

John