i've an untry idea, but don't know workable or not.
the hour glass appeared because the image file has to be loaded into the memory
each time the image changes.
this idea is to have 3 image objects created first.
only 1 image object is visible at any one time.
when the mouse move into the button,
make the normal image object invisible and make the rollover image visible.
i think this way will stop the hour glass to appear because all images have
already loaded in the memory, do you think so ?
do you think this way will work ?

Alaster