function rowOverEffect(object) {
  if (object.className == 'step1') object.className = 'step1-on';
  if (object.className == 'step2') object.className = 'step2-on';
}
function rowOutEffect(object) {
  if (object.className == 'step1-on') object.className = 'step1';
  if (object.className == 'step2-on') object.className = 'step2';
}