function country_selected(country_id) {
	var form = document.forms[0];

	var l = regions[country_id].length;

	form.region_id.options.length = l;
	form.region_id.selectedIndex = 0;
	for (i = 0; i < l; i++) {
		var information = regions[country_id][i].split(":");
		var region_id = information[0];
		var region = information[1];
		form.region_id.options[i + 1] = new Option(region, region_id);
	} 
}

function region_selected(region_id) {
	var form = document.forms[0];

	var l = hotels[region_id].length;

	form.hotel_id.options.length = l;
	form.hotel_id.selectedIndex = 0;
	for (i = 0; i < l; i++) {
		var information = hotels[region_id][i].split(":");
		var hotel_id = information[0];
		var hotel = information[1];
		form.hotel_id.options[i + 1] = new Option(hotel, hotel_id);
	} 
}
function calculate() {
price = 0;
rates = new Array();
for(i=0;i<document.booking.elements.length;i++) {
	if(document.booking.elements[i].name.indexOf("rates_season_") != -1) {
		rates.push(document.booking.elements[i].value);
	}
}



periods = document.booking.dates.value.split(":");

monthinshort = document.booking.monthin.value.substr(0,3);
monthoutshort = document.booking.monthout.value.substr(0,3);
arrivalstr = monthinshort+' '+document.booking.dayin.value+', '+document.booking.yearin.value;
departurestr = monthoutshort+' '+document.booking.dayout.value+', '+document.booking.yearout.value;
todaystr = document.booking.thismonth.value+' '+document.booking.today.value+', '+document.booking.thisyear.value;
arrivaldate = new Date(arrivalstr);
departuredate = new Date(departurestr);
today = new Date(todaystr);
holidays = (departuredate-arrivaldate)/86400000;


if(holidays > 0 || arrivaldate > today) {
	price = 0;
	for(i=0;i<holidays;i++) {
		antaldage = new Date(i*86400000);
		daytocalculate = (arrivaldate-0)+(antaldage-0);

		for(j=0;j<periods.length;j++) {
			period_dates 	= periods[j].split("-");
			startdate 		= new Date(period_dates[0]);
			enddate 		= new Date(period_dates[1]);
							
			if(daytocalculate >= (startdate-0) && daytocalculate <= (enddate-0)) { // within period
				accommodation = document.booking.accommodation.value.substr(0,1);
				periodrates = rates[j+(accommodation-1)*periods.length].split(",");
				price += Number(periodrates[document.booking.accommodationsize.value]);
			}
		}
	}
}
document.booking.fullamount.value = Math.round(price/5)*5*document.booking.rooms.value;

}