Customizing Menu in SL 360 to Indicate Unanswered Exam Questions

Greetings, 

I am building a True/False exam in SL 360. We give our students the option to skip questions and then return to them later to select an answer. Is there a way—I'm thinking that the only way is through customizing JavaScript—to change the color in the menu to indicate that a question has been missed? For example, the menu is black with white text, I skip question #45 and the menu text changes to red. It gives the learner a visual reminder as to which questions were left unanswered. 

Thank you.