varying in 1 D Evaluator as elapsed time

dear all,

Can we vary the parameter u ( 0.0 to 1.0) which is used for evaluating
Bezier curve as a function of elapsed time .

elapsed time = currtime - prevtime;
and normalize 0.0 to 1.0

Is it possible.

With regards,
RAJESH.R
IRIS, CAIR,
Bangalore -1