solver.js

var url = 'http://gdd-2011-quiz-japan.appspot.com/webgame/problem';
$.get(url, {}, function(data) {
          var comment;
          if (data.match(/(\[[^\]]+\])/)) {
              comment = RegExp.$1;
          }
          var list = eval(comment);
          var pos = {};
          for (var i = 0; i < list.length; i += 1) {
              var key = list[i];
              if (pos[key] == undefined) {
                  pos[key] = [];
              }
              if (pos[key].length > 1) {
                  alert(key + ' has too many pos ' + pos[key] + ', ' + i);
              }
              pos[key].push(i);
          }
          solve(pos);
      });

function solve(pos) {
    for (var key in pos) {
        var p = pos[key];
        if (p.length < 2) {
            alert('pos too short : ' + p + ' for key: ' + key);
        }
        var h = p.shift();
        var t = p.shift();
        show(h);
        show(t);
        while (p.length >= 2) {
            h = p.shift();
            t = p.shift();
            show(h);
            show(t);
        }
    }
}
function show(n) {
    var element = document.getElementById('card' + n);
    var myevent = document.createEvent('MouseEvents');
    myevent.initEvent('click', false, true);
    element.dispatchEvent(myevent);
}