Rails spinoffs - May 2006 - script.aculo.us add multiple slider values together

Hy there
I''m sucessfully use the scriptaculous sliders. I''m not a
programmer at
all and managed to set up the sliders on a page. Great work guys!

I like to add diffrent slidervalues together and make an output of the 
sum. Something like
slider 1: 23.4567
Slider 2: 10.123

Output: Sum=33.5797
If ($Sum >=30) { output(''Great Score!)}
If ($Sum <30 {output(''You can do better!)}


I would like to implement it in this demo:
http://www.vum.ch/schulfernsehen/index.htm

THX for your help
cheers
thomas