[jQuery] Set effect speed to pixels/second rather than total time?

[jQuery] Set effect speed to pixels/second rather than total time?


The way effects such as slideDown and slideUp currently work is on a
time value for the whole effect. This poses a problem: for two
elements of different length being shown, the longer element will show
more quickly than the shorter element.
Is it possible to set the speed of effects to a more constant speed
value? Something proportional to pixels per second (i.e. distance/
time). So elements would show at the same *rate*.