Highlight links

highlight_links.js

javascript: (function () {
  var i, x;
  for (i = 0; (x = document.links[i]); ++i) {
    let color = ['blue', 'red', 'orange'][
      sim(x, location)
    ];
    x.style.setProperty('color', color, 'important');
    x.style.setProperty('text-decoration', 'underline', 'important');
    x.style.setProperty('font-weight', '700', 'important');
    x.style.setProperty('border', '3px solid green', 'important');
  }

  function sim(a, b) {
    if (a.hostname != b.hostname) return 0;
    if (fixPath(a.pathname) != fixPath(b.pathname) || a.search != b.search)
      return 1;
    return 2;
  }
  function fixPath(p) {
    p = (p.charAt(0) == '/' ? '' : '/') + p;
    /*many browsers*/ p = p.split('?')[0];
    /*opera*/ return p;
  }
})();