Change visited hyperlink's color
I have a Jeopardy style game that I designed in Powerpoint (before Keynote was released) that uses a main board (5x5 square) that has hyperlinked text for each point amount in each category. In Powerpoint I could change the color of a visited hyperlink to the background color so the text would become invisible once clicked. The click would take me to the appropriate answer and question slides with a hyperlink there for taking me back to the main board. Since the text link for that answer and question would now be invisible I could easily keep track of what categories and amounts had already been selected.
Is there any way to accomplish this same effect in Keynote? Thanks in advance for your help.
Powerbook G4 Titanium Mac OS X (10.4.3)