js改变浏览器标签标题

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如题，因为Chatbox写了个对象。。。好吧，写了个Object：

var changeTitle = {
	time: 0,
	originTitle: document.title,
	timer: null,
	change: function() {
		document.title = "~New Message Received~ " + changeTitle.originTitle;
	},
	notify: function() {
		if(document.title.indexOf("~New Message Received~")) clearTimeout(changeTitle.timer);
		document.title = "~New Message Received~ " + changeTitle.originTitle;
		changeTitle.timer = setTimeout(function(){changeTitle.clear();},3000);
	},
	flash: function() {
		changeTitle.timer = setTimeout(function () {
			changeTitle.time++;
			changeTitle.flash();
			if (changeTitle.time % 2 === 0) {
				document.title = "~                    ~ " + changeTitle.originTitle;
			}else{
				document.title = "~New Message Received~ " + changeTitle.originTitle;
			}
		}, 500);
	},
	reset: function() {
		clearTimeout(changeTitle.timer);
		document.title = changeTitle.originTitle;
	}
};

通过以下方法可以调用：

changeTitle.change();//更改标题
changeTitle.notify();//更改标题3秒后恢复
changeTitle.flash();//闪烁标题
changeTitle.reset();//复位标题

通过监听visibilitychange，你可以完成一些有意思的动作，比如进入和离开页面时改变标题（具体应该说标签为非前置状态时改变标题，标签前置状态时改变标题）：

var changeTitle={time:0,originTitle:document.title,timer:null,change:function(){document.title="~New Message Received~ "+changeTitle.originTitle},notify:function(){if(document.title.indexOf("~New Message Received~"))clearTimeout(changeTitle.timer);document.title="~New Message Received~ "+changeTitle.originTitle;changeTitle.timer=setTimeout(function(){changeTitle.reset()},3000)},flash:function(){changeTitle.timer=setTimeout(function(){changeTitle.time++;changeTitle.flash();if(changeTitle.time%2===0){document.title="~                    ~ "+changeTitle.originTitle}else{document.title="~New Message Received~ "+changeTitle.originTitle}},500)},reset:function(){clearTimeout(changeTitle.timer);document.title=changeTitle.originTitle}};
document.addEventListener('visibilitychange', function() {
    if (document.hidden) {
        changeTitle.flash();
    } else {
        changeTitle.reset();
    }
});

上述例子，为方便显示把changeTitle对象压缩了。

最后，为情人节干杯。

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