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function createStyle() {
  var css = '',
      head = document.head || document.getElementsByTagName('head')[0],
      style = document.createElement('style');

  css += '.hide { display: none; }';

  style.type = 'text/css';

  if (style.styleSheet) {
      style.styleSheet.cssText = css;
  } else {
      style.appendChild(document.createTextNode(css));
  }

  head.appendChild(style);
}
createStyle();