how to disable seek bar

Hello everyone,

I am developing a course were we want te user to view each slide until the timeline ends, disabling the navigation to the slides still not visited, jumping tho the next one with "next" button only at the end of timeline. I accomplish this by using a "restricted" navigation (menu option in the player features) and by using 3 triggers and 1 custom variable as follow:

- set endslide equal to false when the timeline starts

- set endslide equal to ftrue when the timeline ends

- jump to next slide when the user clicks the next button If endslide is equal to true

The fact is that I need to use the seekbar in each slide to show the user a "preview" of the lenght of each slide.

everything works great, apart from the fact that the user can click on the seekbar and jump forward to the end of the timeline, tricking everything. 

I couldnt find a way to disable the seeking, i was asking myself if it is possible to edit the player inserting a hotspot or something invisible over the seeking area that can override the seeking feature.

Thank you for any suggestion!