Rollimage = new Array()
Rollimage[0] = new Image(88,17) 
Rollimage[0].src = "i/thumbs1-1.jpg" 
Rollimage[1] = new Image(88,17)
Rollimage[1].src = "i/thumbs2-1.jpg"
Rollimage[2] = new Image(88,17)
Rollimage[2].src = "i/thumbs3-1.jpg"
Rollimage[3] = new Image(88,17)
Rollimage[3].src = "i/thumbs4-1.jpg"
Rollimage[4] = new Image(88,17)
Rollimage[4].src = "i/thumbs5-1.jpg"

function SwapOut(buttonno, imgNo) {
  buttonno.src = Rollimage[imgNo].src;
  return true;
} 

function SwapBack(buttonno, imgNo){
  buttonno.src = imgNo;
  return true;
}