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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