function showAges()
{
  var kids = 0
  for( var i=1 ; i<=4 ; i++)
    kids = kids + parseInt(document.getElementById("Room-" + i + "-Chd").value)  
  
  for (var i=1 ; i<=10 ; i++)
  {
    id = document.getElementById("age" + i)

    if (i <= kids)
      id.style.display = "block"
    else
    {
      id.style.display = "none"
      document.getElementById("ChildAges-ChAg" + i ).selectedIndex = 0
    }
  }
}