Rollimage = new Array()
Rollimage[0] = new Image(88,17) 
Rollimage[0].src = "i/thumbs4-1.jpg" 
Rollimage[1] = new Image(88,17)
Rollimage[1].src = "i/thumbs4-2.jpg"
Rollimage[2] = new Image(88,17)
Rollimage[2].src = "i/thumbs4-3.jpg"
Rollimage[3] = new Image(88,17)
Rollimage[3].src = "i/thumbs4-4.jpg"
Rollimage[4] = new Image(88,17)
Rollimage[4].src = "i/thumbs4-5.jpg"
Rollimage[5] = new Image(88,17)
Rollimage[5].src = "i/thumbs4-6.jpg"
Rollimage[6] = new Image(88,17)
Rollimage[6].src = "i/thumbs4-7.jpg"
Rollimage[7] = new Image(88,17)
Rollimage[7].src = "i/thumbs4-8.jpg"
Rollimage[8] = new Image(88,17)
Rollimage[8].src = "i/thumbs4-9.jpg"
Rollimage[9] = new Image(88,17)
Rollimage[9].src = "i/thumbs4-10.jpg"
Rollimage[10] = new Image(88,17)
Rollimage[10].src = "i/thumbs4-11.jpg"
Rollimage[11] = new Image(88,17)
Rollimage[11].src = "i/thumbs4-12.jpg"
function SwapOut(buttonno, imgNo) {
  buttonno.src = Rollimage[imgNo].src;
  return true;
} 

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