// JavaScript Document

  Rollimage = new Array()

  Rollimage[0]= new Image(120,65)
  Rollimage[0].src = "/kuvat/kerrokaverille1.gif"

  Rollimage[1] = new Image(120,65)
  Rollimage[1].src = "/kuvat/kerrokaverille2.gif"

  function SwapOut(){
    document.kerrokaverille.src = Rollimage[1].src;
    return true;
  }

  function SwapBack(){
    document.kerrokaverille.src = Rollimage[0].src; 
    return true;
  }