Little help with on(rollover)

Dear Users,

a bit new to this

cant for the life of me figure out how to make the image go away after i have roller over it

on (rollOver, release) {
myloader.contentPath = “sig.jpg”
}

am using "sig.jpg as the image

am using loader component

i have 3 components. when the user rollovers an invisible button an image displays, the problem is the rolover image doesnt go away

if can help or provide me with better code id appreciate heaps