chrome.extension.onMessage.addListener(
    function (request, sender, sendResponse) {
        var msg = "Recv Commond [" + request.action + "] from (" + request.from + ")";
        sendResponse(msg);
        console.log(msg);

        if (request.action == "cs_read_page") {
            var rd = document.getElementById('toRead');
            rd.click();
            chrome.runtime.sendMessage({ from: "content_scripts", to: "background", action: 'bg_click_table', tabId: request.tabId }, function (response) {
                console.log(response);
            });
        }
    }
);