function RoomAlert(room,adults,children,people,message)
{
  this.room=room;
  this.adults=adults;
  this.children=children;
  this.people=people;
  this.message=message;  
}

function GuestMessage(room,guests,message)
{
  this.room=room;
  this.guests=guests;
  this.message=message;
}

function get_alert(room,adults,children) 
{
  var people=adults+children;
  var index=-1,max=0;
  // ok now find appropriate message.....
  for (var i=0; i < roomAlerts.length; i++) {
    if (roomAlerts[i].room != room)
	  continue;
	if (roomAlerts[i].people && roomAlerts[i].people <= people && roomAlerts[i].people >= max) {
	  index=i;
	  max=roomAlerts[i].people;
	}  
	else if (roomAlerts[i].adults && roomAlerts[i].adults <= adults && roomAlerts[i].adults >= max) {
	  index=i;
	  max=roomAlerts[i].adults;
	}  
	else if (roomAlerts[i].children && roomAlerts[i].children <= children && roomAlerts[i].children >= max) {
	  index=i;
	  max=roomAlerts[i].children;
	}  
  }	 
  if (index >= 0)
    return roomAlerts[index].message; 
  else
    return null;	
}

function get_guestalert(room,guests)
{
  for (var i=0; i < guestMessages.length; i++)
    if (guestMessages[i].room==room)
	  if (guests > guestMessages[i].guests)
	    return guestMessages[i].message.length ? guestMessages[i].message : 'A maximum of '+guestMessages[i].guests+' people allowed in this room.';
	  else
	    return null;
  return null;			
}

function check_alerts(room,adults,children)
{
  var str;
  // check max guests first     - ignore max guests.....
  if (str=get_guestalert(room,adults+children)) {
    alert(str);
	return false;
  }
  if (str=get_alert(room,adults,children)) 
    alert(str);
  return true;	
}

var roomAlerts=new Array();
var guestMessages=new Array();

roomAlerts[0]=new RoomAlert(5,9,0,0,'3 king doubles and 3 king single beds available to sleep 8 adults.  Additional people will need to sleep on a mattress in the lounge area or book the bunkhouse as well');
guestMessages[0]=new GuestMessage(5,9,'Maximum of 12 allowed in the mainhouse.  Book the bunkhouse as well to cater for up to 20. For larger groups contact us direct.');
guestMessages[1]=new GuestMessage(7,24,'');