Conditional Hyperlink/OpenDocument

Hi,

I have a report which has a hyperlink on a coulmn (OpenDocument).

I have a column called as Inv number.
I also have another column called Inv Type

Inv Type has  I, C,and W values.

So the hyperlink needs to be placed on Invoice Number - once the user
clicks on this - it should check if the Inoice Type is a I, C or W.
Depending on the type, the report has to open.

Question is:

1. How can we perform 3 checks for Invoice Type ie: I, C or W on a single hyperlink