html 代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<button id='shiftBtn' type="button" name="button">开关</button>
<script src='http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js'></script>
<script type="text/javascript">
$(function(){
var timeout=true;
var count=0;
var titleOrigin='';
var running=0;
$('#shiftBtn').on('click',function(){
if(count==0){
titleOrigin=$('title',window.top.document).html();
$('title',window.top.document).html('【有新提醒】'+titleOrigin);
count++;
}
if(timeout){
timeout=false;
}else{
timeout=true;
}
if(running)return;
time();
})
function time()
{
running=1;
if(timeout) {
$('title',window.top.document).html(titleOrigin);
count=0;
running=0;
return;
}
Method();
setTimeout(time,500); //time是指本身,延时递归调用自己,500为间隔调用时间,单位毫秒
}
function Method(){
var titlePre=$('title',window.top.document).html().match(/\【[\s\S]*\】/)[0];
var titleafter=$('title',window.top.document).html().replace(titlePre,'');
if(titlePre=='【有新提醒】'){
$('title',window.top.document).html('【    】'+titleafter)
}else{
$('title',window.top.document).html('【有新提醒】'+titleafter)
}
}
})
</script>
</body>
</html>
