function expand(s, s_act)
{
  var td = s;
  var d = td.getElementsByTagName("div").item(0);

  td.className = "menuHover"+s_act;
  d.className = "menuHover"+s_act;
}

function collapse(s, s_act)
{
  var td = s;
  var d = td.getElementsByTagName("div").item(0);

  td.className = "menuNormal"+s_act;
  d.className = "menuNormal"+s_act;
}