background.html

<html>
    <head>
        <script src="dict.js"></script>
        <script src="main.js"></script>
        <script>
            chrome.browserAction.onClicked.addListener(zhongwenMain.enableToggle);
            chrome.tabs.onSelectionChanged.addListener(zhongwenMain.onTabSelect);
            chrome.extension.onRequest.addListener(
                function(request, sender, response) {
                    switch(request.type) {
                        case 'enable?':
                            zhongwenMain.onTabSelect(sender.tab.id);
                            break;
                        case 'search':
                            var e = zhongwenMain.search(request.text);
                            response(e);
                            break;
                        case 'open':
                            chrome.tabs.create({url: request.url});
                        case 'copy':
                            var txt = document.createElement('textarea');
                            txt.style.position = "absolute";
                            txt.style.left = "-100%";
                            txt.value = request.data;
                            document.body.appendChild(txt);
                            txt.select();
                            document.execCommand('copy');
                            document.body.removeChild(txt);
                        default:
                            // ignore
                    }
                });

            function initStorage(key, defaultValue) {
              var currentValue = localStorage[key];
              if (!currentValue) {
                localStorage[key] = defaultValue;
                return true;
              }
              return false;
            }

            initStorage("popupcolor", "yellow");
            initStorage("tonecolors", "yes");
            initStorage("fontSize", "small");

            zhongwenMain.config = {};
            zhongwenMain.config.css = localStorage["popupcolor"];
            zhongwenMain.config.tonecolors = localStorage["tonecolors"];
            zhongwenMain.config.fontSize = localStorage["fontSize"]
        </script>
    </head>
</html>