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

  if (d != null) {
    td.className = "menuHover";
    d.className = "menuHover";
  }
}

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

  if (d != null) {
    td.className = "menuNormal";
    d.className = "menuNormal";
  }
}