Animating with actionscript

hi there,

i don’t often post in the actionscript section even though i’m very experienced in flash, i’ve been mostly tweening things rather than looking into actionscript to help me out.

i’ve noticed some sites lately that just have such a smoothness to the animation and i want to work on learning how to do that. for example, this site:

someone told me that in order to get that fluidness to the animation, actionscript is used rather than frame tweening. i’ve searched and not sure where to start. does anyone have any links that i could look at to try to learn this type of actionscripting? thanks in advance!