Javascript实现浏览器标题栏文字滚动效果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script language="javascript">
  <!--
  var m1= "来消息啦...";
  var m2= "-";
  var msg=m2+m1;
  function titnimation() {
   msg=msg.substring(1,msg.length)+msg.substring(0,1); 
   document.title = msg;
  }

  setInterval("titnimation()",300);
  //-->
    </script>
</head>
<body>
</body>
</html>

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