function settab(id)
{
  for (var i=0; i<tabs.length; i++)
  {
    document.getElementById("content"+tabs[i]).style.display = "none";
    document.getElementById("contentlink"+tabs[i]).className = "inactive";
  }
  document.getElementById("content"+id).style.display = "block";
  document.getElementById("contentlink"+id).className = "active";
}

function setsubtab(id)
{
  for (var i=0; i<subtabs.length; i++)
  {
    document.getElementById("subcontent"+subtabs[i]).style.display = "none";
    document.getElementById("subcontentlink"+subtabs[i]).className = "inactive";
  }
  document.getElementById("subcontent"+id).style.display = "block";
  document.getElementById("subcontentlink"+id).className = "active";
}