function reloadCaptcha() {
  if(document.getElementById('captcha')) {
    		document.getElementById('captcha').src = 'captcha.php?id=' + randomNumber(2, 10);    	   	
    } 
}

function randomNumber(minimum, maximum){
	var randomnumer = Math.floor(minimum + (maximum - minimum + 1) * (Math.random()));
	return randomnumer;
}

function openPopup(file_name) {
	helpwindow = window.open(file_name, "pophelp", "width=420, height=220");
	helpwindow.focus();
	return false;
}

function loadLocation(parties) {
	var party = document.getElementById(parties);
	var partyid = party.options[party.selectedIndex].value;
	var location = document.getElementById('location_music');
	
	location.value = locations[partyid];
}

function loadDate(parties) {
	var party = document.getElementById(parties);
	var partyid = party.options[party.selectedIndex].value;
	var dates_ = document.getElementById('date_music');
	
	dates_.value = dates[partyid];
}

function loadLocation2(parties) {
	var party = document.getElementById(parties);
	var partyid = party.options[party.selectedIndex].value;
	var location = document.getElementById('location_video');
	
	location.value = locations[partyid];
}

function loadDate2(parties) {
	var party = document.getElementById(parties);
	var partyid = party.options[party.selectedIndex].value;
	var dates_ = document.getElementById('date_video');
	
	dates_.value = dates[partyid];
}

function calcTicketSum(tickets) {
	var amount = document.getElementById(tickets).value;
	var location = document.getElementById('sum_special_tickets');

	location.value = amount * 6 + " €";
}

function doGroupTicket(group) {
	var ticket = document.getElementById(group);
	var amount = document.getElementById('tickets_special_tickets'); 
	var sum = document.getElementById('sum_special_tickets');
	
	if(ticket.checked) {
			amount.disabled = true;
			sum.value = 10 * 6 + " €";
			amount.value = "10 + 1";
	} else {
			amount.disabled = false;
			sum.value = 6 + " €";
			amount.value = 1;
	}
}