/*
 * Custom functions
 *
 */

function navDo(el) {
  document.getElementById('nav1').className = 'navi';
  document.getElementById('nav2').className = 'navi';
  document.getElementById('nav3').className = 'navi';
  document.getElementById('nav4').className = 'navi';
  document.getElementById('nav' + el).className = 'naviSelected';
  document.getElementById('hh1').className = 'inactive';
  document.getElementById('hh2').className = 'inactive';
  document.getElementById('hh3').className = 'inactive';
  document.getElementById('hh4').className = 'inactive';
  document.getElementById('hh' + el).className = 'active';
}