var titleInit = document.title, isShine = true;
    setInterval(function() {
        var title = document.title;
        if (isShine == true) {
            if (/新/.test(title) == false) {
                document.title = '【你有新消息】';    
            } else {
                document.title = '【　　　　　】';
            }
        } else {
            document.title = titleInit;
        }
    }, 500);
    window.onfocus = function() {
        isShine = false;
    };
    window.onblur = function() {
        isShine = true;
    };
    // for IE
    document.onfocusin = function() {
        isShine = false;
    };
    document.onfocusout = function() {
        isShine = true;
    };