function CheckClosedAirports(frm, departDate, returnDate, fromAirport, toAirport) {
	var ClosedDestinations = new Array();
	var ClosedDestinationsFromDate = new Array();
	var ClosedDestinationsToDate = new Array();

	

	for (var i=0; i < ClosedDestinations.length; i++) {
		if ((departDate >= ClosedDestinationsFromDate[i] && departDate <= ClosedDestinationsToDate[i]) || (returnDate >= ClosedDestinationsFromDate[i] && returnDate <= ClosedDestinationsToDate[i])) {
			if (toAirport == ClosedDestinations[i] || fromAirport == ClosedDestinations[i]) {
				//store form action and target
				var oldAction = frm.action;
				var oldTarget = frm.target;
				
				//open popup and submit form to popup
				frm.action = '/en/popups/closedairport.aspx?code=' + ClosedDestinations[i] + "&action=" + oldAction;
				window.open('', 'CLOSEDAIRPORT', 'location=0,toolbar=0,menubar=0,scrollbars=0,resizable=0,status=0,width=600,height=200');
				frm.target='CLOSEDAIRPORT';
				frm.submit();
				
				//rewire original action and target
				frm.target=oldTarget;
				frm.action=oldAction;
				
				return false;
			}
		}
	}
	
	return true;
}