Fix SearchBoxをメンテ

長年愛用しつつもgoogleの仕様変更でたびたび使えなくなるGreasemonkey[Fix SearchBox]をメンテ。

記事投稿日を見ると歴史を感じます('-'*
Googleの検索ボックスをページ上方に固定するGreasemonkey

// ==UserScript==
// @name Fix SearchBox
// @description fix search box on google search
// @namespace http://d.hatena.ne.jp/hysa/
// @include http://www.google.co.jp/search*
// @include http://www.google.com/search*
// @include https://www.google.co.jp/search*
// @include https://www.google.com/search*
// ==/UserScript==
(function() {
  // Initialize
  var header = document.getElementById('tsf');
  header.style.top = '0';
  header.style.width = '100%';
  header.style.backgroundColor = '#f5f5f5';
  header.style.zIndex = '254';

  // Fix Header Element
  function fix() {
    header.style.position = 'fixed';
    header.style.borderBottom = '2px solid #6B90DA';
  }

  // Unfix Header Element
  function unfix() {
    header.style.position = 'static';
    header.style.borderBottom = '0';
  }
  var defaultValue = window.getComputedStyle(document.getElementById('tsf'), null).height.replace(/px/, '');
  var threshold = defaultValue || 34;
  var currentPosition = document.documentElement;

  document.addEventListener('scroll',
                            function() {
                              if (currentPosition.scrollTop > threshold) fix();
                              else unfix();
                            }, false);
})();

タグ：Greasemonkey