How change objects color at visu

[Trond Hoyem]

This is not CSS but custom JavaScript (Scripting > Tools > Edit custom JavaScript).

Indeed... works very well when I add it in JS instead of CSS :-)

So then my next question:
The limits in this JS is hard coded. Is there any way to have the limits linked to addresses as well? 
Example; 
Main object is called "Room 1 ACTUAL_TEMP"
Lower limit is called "Room 1 LOWER_LIMIT"
Upper limit is called "Room 1 UPPER_LIMIT"

What I want to do is make a visu-page showing the freezer rooms with large temperature number that is coloured depending on the temperature in each room, and the limits should be adjustable for each room by the staff.