function init(page) {
  document.getElementById('agreement') ? document.getElementById('agreement').checked = false : null;
  document.getElementById('download') ? document.getElementById('download').disabled = true : null;
}

function checkAgreement() {
  (document.getElementById('agreement') && document.getElementById('agreement').checked) ? document.getElementById('download').disabled = false : document.getElementById('download').disabled = true;
}

function startDownload() {
  document.location.href = "../files/methodology.rar"
}