chrome/common/extensions/docs/examples/api/topsites/basic/popup.js

// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Event listener for clicks on links in a browser action popup.
// Open the link in a new tab of the current window.
function onAnchorClick(event) {
  chrome.tabs.create({ url: event.srcElement.href });
  return false;
}

// Given an array of URLs, build a DOM list of these URLs in the
// browser action popup.
function buildPopupDom(mostVisitedURLs) {
  var popupDiv = document.getElementById('mostVisited_div');
  var ol = popupDiv.appendChild(document.createElement('ol'));

  for (var i = 0; i < mostVisitedURLs.length; i++) {
    var li = ol.appendChild(document.createElement('li'));
    var a = li.appendChild(document.createElement('a'));
    a.href = mostVisitedURLs[i].url;
    a.appendChild(document.createTextNode(mostVisitedURLs[i].title));
    a.addEventListener('click', onAnchorClick);
  }
}

chrome.topSites.get(buildPopupDom);