$(document).ready(function() {
  $('div.slideshow').slideshow({intervalTime:3600});
  
  $('#activiteiten tr:not(.omschrijving)').click(function() {
    $(this).toggleClass('selected').next('tr').toggleClass('selected');
  });
});

function selectie_wissen() {
  $('form#selecteren input.tekst').val("");
  $('form#selecteren select').val("");
  $('form#selecteren').submit();
}