Remove a random rule from a random stylesheet

remove_rand_style.js

(function(document) {
  function getRandomInt(max) {
    return Math.floor(Math.random() * max);
  }
  
  var sheets = document.styleSheets,
      sheet = sheets[getRandomInt(sheets.length-1)],
      rules = sheet.cssRules,
      rule = getRandomInt(rules.length-1);

  // console.log(rules[rule]);
  sheet.deleteRule(rule);
})(document);