var group = 0, ind = 0, fd = 0, fl = 0, pax = 0, options = new Array();
function setPrices(g, i, f) { group = g; ind = i; fd = f; }
function setPax(p) { p.replace(/[^0-9]/g, ''); if(p <= 0) p = 2; pax = p; return p; }
function changeFlight(id) { fl = flights[id]; }
function calculate() { 
  var prijs = 0;
  if(document.getElementById('type:group') != null) if(document.getElementById('type:group').checked) prijs += group;
  if(document.getElementById('type:individual') != null) if(document.getElementById('type:individual').checked) prijs += ind;
  if(document.getElementById('type:flydrive') != null) if(document.getElementById('type:flydrive').checked) prijs += fd;
  prijs += fl;
  prijs *= pax;
  for(i = 0; i < optionCount; i++) 
    if(options[i]) prijs += options[i];
  document.getElementById('reiskoffer_prijs').innerHTML = "<b>&euro; " + FormatCurrency(prijs).toString() + " voor " + pax + (pax == 1 ? " persoon" : " personen") + "</b> (&euro; " + FormatCurrency(prijs / pax).toString() + " per persoon)";
}
function display_price_tr() { document.getElementById('reiskoffer_prijs_tr').style.display = ""; }