javascript 替換瀏覽器Tab的title實現訊息通知提示，tabtitle

javascript 替換瀏覽器Tab的title實現訊息通知提示，tabtitle
實現邏輯：
1. 建立兩個互調用函數 setTitle1和setTitle2
2. 定時調用機制
3. 表單擷取焦點和失去焦點存狀態
4. 來訊息了存狀態（在本例中，類比每3秒來1個訊息）
5. 在setTitle1中判斷狀態

完整代碼：

<script src="jquery-1.10.2.js" ></script><div class="pnl"></div><script>var newMsg = false;        var window_focused = true;setInterval(function(){$(".pnl").append("<div>new msg</div>");newMsg = true;}, 3000);function setTitle1(){if(newMsg === true && window_focused === false){document.title = "New Msg";setTimeout(setTitle2,100);}}function setTitle2(){document.title = "";setTimeout(setTitle1,100);}setInterval(setTitle1, 1000);$(window).focus(function (e) {            window_focused = true;        });        $(window).blur(function (e) {            window_focused = false;        });</script>