function toggleListSelectAllOrNone(selectAllOrNoneToggle, namePrefix) {
  var f = selectAllOrNoneToggle.form;
  for (var i=0; i < f.elements.length; i++) {
    var box = f.elements[i];
    if (box.checked != selectAllOrNoneToggle.checked) {
      if (box.name.substring(0, namePrefix.length) == namePrefix) {
        if (selectAllOrNoneToggle.checked) {
          box.checked = true;
        }
        else {
          box.checked = false;
        }
      }
    }
  }
}

function setBereikbaarheidvandaagAll(htmlPrefixStr) {
  document.getElementById(htmlPrefixStr+'08000900').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'09001000').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'10001100').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'11001200').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'12001300').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'13001400').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'14001500').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'15001600').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'16001700').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
  document.getElementById(htmlPrefixStr+'17001800').checked = document.getElementById(htmlPrefixStr+'heledag').checked;
}

function setBereikbaarheidvandaagTijdvak(htmlPrefixStr) {
  if (document.getElementById(htmlPrefixStr+'08000900').checked &&
      document.getElementById(htmlPrefixStr+'09001000').checked &&
      document.getElementById(htmlPrefixStr+'10001100').checked &&
      document.getElementById(htmlPrefixStr+'11001200').checked &&
      document.getElementById(htmlPrefixStr+'12001300').checked &&
      document.getElementById(htmlPrefixStr+'13001400').checked &&
      document.getElementById(htmlPrefixStr+'14001500').checked &&
      document.getElementById(htmlPrefixStr+'15001600').checked &&
      document.getElementById(htmlPrefixStr+'16001700').checked &&
      document.getElementById(htmlPrefixStr+'17001800').checked) {
    document.getElementById(htmlPrefixStr+'heledag').checked = true;
  } else {
    document.getElementById(htmlPrefixStr+'heledag').checked = false;
  }
}

function toggleFormNieuweTaak() {
  if (document.getElementById('gesprregform').className == 'invisible') {
    document.getElementById('gesprregform').className = 'visible';
    document.getElementById('gesprregbuttonbar').className = 'visible';
    document.getElementById('gesprregtogglevis').value = 'Verberg formulier \'nieuwe taak\'';
    setCookie('ntfo', '1', 0);
  } else {
    document.getElementById('gesprregform').className = 'invisible';
    document.getElementById('gesprregbuttonbar').className = 'invisible';
    document.getElementById('gesprregtogglevis').value = 'Toon formulier \'nieuwe taak\'';
    setCookie('ntfo', '0', 0);
  }
}

function setCookie(name, value, days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else var expires = "";
  document.cookie = name + "=" + value + expires + "; path=/;"
}

function getCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for (var i = 0; i < ca.length; i++) {
    var c = ca[i];
    while (c.charAt(0) == ' ') c = c.substring(1, c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
  }
  return null;
}