Universal slider

Universal slider

Hi,
I am using the universal slider to display floors of lift.
when i enter negative value the slider knob remains at respective positive value.
slider works perfectly for positive values.
what i want is slider knob should be at negative value when negative value is entered.
Please give solution.
Find attached snaps.

This is a migrated post! Originally posted on 14.08.2014 by user jahidbagwan. Please be aware that information can be outdated.