Alpha fade on rollover

wow, i think this is like the 5th time i’m asking this question, no one could help-

ok, i’ll ask it differently this time. I just want the button to fade out on rollover. at the same time, i would like text (that is loaded externally in a text field called “caption”) to fade in also on rollover.

i’ve tried sooooo many things - scavenging this board and others.

suggestions pleasepleaseplease thanks!