function setup(ans) {
    lit =   ''
    litt =  'Maak aub een keuze'
  if (ans == '1') {
        window.location="http://www.mondengebit.nl/category.php?id_category=17&uitv=twlg";
  } 
  if (ans == '2') {
        window.location="http://www.mondengebit.nl/category.php?id_category=18&uitv=twlgpl";
  }
  if (ans == '3') {
        window.location="http://www.mondengebit.nl/category.php?id_category=19&uitv=drlgpl";
  }
  document.getElementById('rep').innerHTML=lit
  document.getElementById('repp').innerHTML=litt
}