var main = document.querySelector('main');

function showPage(name) {
  var html = document.getElementById(`t-${name}`).innerHTML;
  main.innerHTML = html;
}

window.addEventListener('hashchange', function() {
  setPageFromHash();
});

function setPageFromHash() {
  var hash = window.location.hash.substr(1);

  if (hash === 'about') {
    showPage('about');
  } else {
    showPage('home');
  }
}

setPageFromHash();