function checkenterdateform()
{
  var d1=new Date(document.getElementById('year1').value,document.getElementById('month1').value,document.getElementById('date1').value);
  var d2=new Date(document.getElementById('year2').value,document.getElementById('month2').value,document.getElementById('date2').value);
  var dc=new Date();
  if (d2<d1) { alert('Finish date of holiday cannot be set to before starting date.'); return false; }
  else if ((d1<dc) || (d2<dc)) { alert('Holiday dates cannot be set to before the current date.'); return false; }  
  else { return true; }
}

function checkchangedateform()
{
  var d1=new Date(document.getElementById('year1').value,document.getElementById('month1').value,document.getElementById('date1').value);
  var d2=new Date(document.getElementById('year2').value,document.getElementById('month2').value,document.getElementById('date2').value);
  var dc=new Date();
  if (d2<d1) { alert('Finish date of holiday cannot be set to before starting date.'); return false; }
  else { return true; }
}

function checkloginform()
{
  if ((document.loginform.username.value=='') || (document.loginform.password.value=='')) { alert('You must enter your username and password to proceed.'); return false; }
  else { return true; }
}