// wrapper for 'normal' rollover function
function ro_Normal (itemId)
{
  ro_imgNormal ('ro_img_' + itemId);
}

// wrapper for 'over' rollover function
function ro_Over (itemId)
{
  ro_imgOver ('ro_img_' + itemId);
}

// 'normal' rollover state
function ro_imgNormal (imgName)
{
  if (document.images)
  {
    document[imgName].src = eval (imgName + '_n.src');
  }
}

// 'over' rollover state
function ro_imgOver (imgName)
{
  if (document.images)
  {
    document[imgName].src = eval (imgName + '_o.src');
  }
}