Making a linked shape unclickable via trigger


I'm trying to make a navigation bar where the user will be able to navigate by Next and Previous buttons and by clicking on oval shapes that will define the status of the page (current page - pink, visited - blue, unavailable - grey)

I'm trying to find a way to disable the hand cursor when the user hovers over the unavailable oval.

I attached a screenshot (Hebrew, goes right to left):

I searched this forum and found a the option of putting a hotspot on top of the shape and disabling the hand cursor. However, a hotspot cannot be showed or hidden in triggers, therefor doesn't solve my problem.

Any other suggestions?

Many thanks!

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