function detatchFromDOM(els) {

​

  for (i = 0; i < els.length; ++i) {

     els[i].parentNode && els[i].parentNode.removeChild(els[i]);

  }

​

  return els;

}

​

function attachToDOMById(id, els) {

  detatchFromDOM(els);

  var filter = Array.prototype.filter;

  var el = filter.call(els, function(el) {

    return el.id === id;

  });

  el[0] && document.body.appendChild(el[0]);

}

​

var tabContents = document.querySelectorAll('.homepagetabcontent');

​

detatchFromDOM(tabContents);

​

attachToDOMById('tabcontent0', tabContents);

​

setTimeout(function() {

  attachToDOMById('tabcontent1', tabContents);

}, 4000);

​