function totalPrice () {

  var price;
  var curr;
  if (document.getElementById('menu').value == 'Dinning & Dancing: 41 EUR') {
    price = 41;
    curr = 'EUR';
  }
  if (document.getElementById('menu').value == 'Drinking & Dancing: 29 EUR') {
    price = 29;
    curr = 'EUR';
  }
  if (document.getElementById('menu').value == 'New Year`s Eve: 3 600 CZK') {
    price = 3600;
    curr = 'CZK';    
  }
  if (document.getElementById('menu').value == 'Christmas pckg.: 1 800 CZK') {
    price = 1800;
    curr = 'CZK';    
  }
  if (document.getElementById('menu').value == 'Jídlo a tanec: 1000 KČ') {
    price = 1000;
    curr = 'KČ';    
  }
  if (document.getElementById('menu').value == 'Pití a tanec: 714 KČ') {
    price = 714;
    curr = 'KČ';    
  }    

          
  var total = document.getElementById('persons').value * price;

  
  
  document.getElementById('total').innerHTML = total + ' ' + curr;
  
  
  
}