function calc_total() {
	var total=0;
	if (document.getElementById('student').checked==true){
		var prices=student_prices;
	} else {
		var prices=regular_prices;
	}
	
	for (var item in prices) {
		if (document.getElementById(prices[item].field).checked==true) {
			total+=prices[item].price;
		}
	}
	
	if (document.getElementById('type').value=="Single room"){
		total+=single_room_price*document.getElementById('number_of_nights').value;
	}
	if (document.getElementById('type').value=="Twin room"){
		total+=twin_room_price*document.getElementById('number_of_nights').value;
	}
	if (document.getElementById('accompanying_persons').value>0) {
		total+=accompanying_person_price*document.getElementById('accompanying_persons').value;
	}
	
	$('#total').html(total.toFixed(2)+" €");
	return true;
}

function make_initials() {
	var firstname=document.getElementById('firstname').value;
	var parsename=firstname.replace("-"," ");
	var tmp=parsename.split(" ");
	var initial="";
	for (var part in tmp) {
		if (tmp[part][0]!=undefined) {
			if (initial.length>0) { initial+=" "; }
			initial+=tmp[part][0]+".";
		}
	}
	document.getElementById('initial').value=initial;
}