function lightup(cell,active,tier) {
  if(tier == 1) {
    on = "#602100";
    off = "";
  }
  else if(tier == 2) {
    on = "#FFFFFF";
    off = "";
  }
  
  if(active) {
   cell.style.cursor='hand';
   cell.style.backgroundColor=on;
  }
  else
   cell.style.backgroundColor=off;
  
  return true;
}