// 存在しないHTML要素を生成
// http://ameblo.jp/linking/theme-10012452229.html
// for Internet Explorer
document.createElement('abbr');
// HTML5
document.createElement('header');
document.createElement('footer');
document.createElement('section');
document.createElement('aside');
document.createElement('nav');
document.createElement('article');
document.createElement('figure');
document.createElement('time');