radio-head.js

document.addEventListener('DOMContentLoaded', function() {
  document.querySelectorAll('label')[0].classList.add('button-press');

  document.addEventListener('click', function(e) {
    var e = e || window.event,
        target = e.target || e.srcElement,
        text = target.textContent || target.innerText;

    if (target.tagName.toLowerCase() == 'label') {
      var labels = document.querySelectorAll("label");
      [].forEach.call(labels, function(el) {
          el.classList.remove("button-press");
      });

      target.classList.add("button-press");

      console.log('text', text);
      console.log('target', target);
      console.log('tagname', target.tagName.toLowerCase());
    }
  }, false);
}, false);