how to do Cycle Plugin Next and Prev opacity 0~1 effect?

how to do Cycle Plugin Next and Prev opacity 0~1 effect?

I try to follow the site: http://www.cmegroup.com/ which uses cycle plugin as a slider.
everything is ok but  Next and Prev opacity  effect?
how to do ?
is cycle plugin include this effect?
or I miss sth. to do?
can anyone help me ?
thanks.