<!--
function rollon(imgName) {
  if (document.images) document[imgName].src = eval(imgName + 'on.src');
}
function rolloff(imgName) {
  if (document.images) document[imgName].src = eval(imgName + 'off.src');
}
function rolldown(imgName) {
  if (document.images) document[imgName].src = eval(imgName + 'down.src');
}
// -->