Leaflet highlight polygon

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" href="//cdn.leafletjs.com/leaflet-0.7.5/leaflet.css" />
    <link rel="stylesheet" href="//cdn.rawgit.com/Leaflet/Leaflet.label/master/dist/leaflet.label.css" />
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <ul id="list"></ul>
    <div id="leaflet"></div>
    <script type="text/javascript" src="//cdn.leafletjs.com/leaflet-0.7.5/leaflet.js"></script>
    <script type="text/javascript" src="//cdn.rawgit.com/Leaflet/Leaflet.label/master/dist/leaflet.label.js"></script>
    <script type="text/javascript" src="script.js"></script>
  </body>
</html>

var map = new L.Map('leaflet', {
  'center': [0, 0],
  'zoom': 0,
  'layers': [
    L.tileLayer('http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png', {
      attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors, &copy; <a href="http://cartodb.com/attributions">CartoDB</a>'
    })
  ]
});

var style = {
  'default': {
    'color': 'yellow'
  },
  'highlight': {
    'color': 'red'
  }
};

var group = new L.LayerGroup([
  new L.Polygon([
    [-50, -50], [50, -50], [50, -10], [-50, -10]
  ], {'label': 'Polygon 1', 'popup': 'Polygon 1'}),
  new L.Polygon([
    [-50, 10], [50, 10], [50, 50], [-50, 50]
  ], {'label': 'Polygon 2', 'popup': 'Polygon 2'})
]).addTo(map);

var highlight;

function setHighlight (layer) {
  if (highlight) {
    unsetHighlight(highlight);
  }
  layer.setStyle(style.highlight);
  highlight = layer;
}

function unsetHighlight (layer) {
  highlight = null;
  layer.setStyle(style.default);
}

group.eachLayer(function (layer) {

  layer.setStyle(style.default);

  layer.bindLabel(layer.options.label);

  layer.bindPopup(layer.options.popup);

  layer.on('mouseover', function (e) {
    setHighlight(layer);
  });

  layer.on('mouseout', function (e) {
    unsetHighlight(layer);
  });

  var list = L.DomUtil.get('list'),
      item = L.DomUtil.create('li', 'item', list),
      link = L.DomUtil.create('a', 'link', item);

  link.textContent = layer.options.label;
  link.href = '#';

  L.DomEvent.addListener(link, 'click', function (e) {
    setHighlight(layer);
  });
  
});

body {
  margin: 0;
}
html, body, #leaflet {
  height: 100%;
}