Get number in value list
I think it will not be very difficult, but I can't figure it out.
If a user selects a value of a value list, I want to know if it is the first or the last value of the value list.
To make it easier for the user I have a button "select all" and then everything is selected form the first value until the last value. (Works all fine). To make it even more easy, I want to give the fields another color if everything is selected, so the user can see immediately if all values are selected.
Thanks in advance,