devquiz

cardfliper.js

(function() {
  var cardsNum = document.querySelectorAll('.card').length;
  for (var i=0; i<cardsNum; i++) {
    for (var j=i+1; j<cardsNum; j++) {
      flip(i);
      flip(j);
    }
  }

  function flip(idx) {
    var card = document.getElementById('card'+idx);
    var myEvent = document.createEvent('MouseEvents');
    myEvent.initEvent('click', false, true);
    card.dispatchEvent(myEvent);
  }
})();

manifest.json

{
  "name": "ChromeExtensionSolverHint",
  "version": "1.0",
  "description": "check dev quis card",
  "content_scripts": [
    {
      "matches": [
        "http://gdd-2011-quiz-japan.appspot.com/webgame/problem*"
      ],
      "js": [
        "cardfliper.js"
      ]
    }
  ],
  "permissions": [
  ]
}