$(function() {

    $("#results").hide();
    $("input:radio").click(function() {
      if ($("input:radio:checked").size() == 10) {
        $('#show_results').removeAttr("disabled");
      }
    });
    $('#show_results').click(function() {
      var s = "";

      $("input:radio:checked").each(function(){
        s += $(this).attr("value");
      });

      var a = s.match(/A/g);
      if (a == null) {
        a = [];
      }
      a = a.length;

      var b = s.match(/B/g);
      if (b == null) {
        b = [];
      }
      b = b.length;

      var c = s.match(/C/g);
      if (c == null) {
        c = [];
      }
      c = c.length;

      var d = s.match(/D/g);
      if (d == null) {
        d = [];
      }
      d = d.length;

      var e = s.match(/E/g);
      if (e == null) {
        e = [];
      }
      e = e.length;

      total = (a * 10) + (b * 6) + (c * 4) + (d * 2) + (e * 0);

      $("#sum").append(total);
      $("#questions").fadeOut("slow", function() {
        $("#results").slideDown("slow");
      });
    });
});