<meta charset="utf-8">
<head>
<script>
function setCookie(cname,cvalue,exdays){
var d = new Date();
d.setTime(d.getTime()+(exdays*24*60*60*1000));
var expires = "expires="+d.toGMTString();
document.cookie = cname+"="+cvalue+"; "+expires;
}
function getCookie(cname){
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i].trim();
if (c.indexOf(name)==0) { return c.substring(name.length,c.length); }
}
return "";
}
function checkCookie(){
var user=getCookie("username");
if (user!=""){
alert("welcome" + user + " Visit again");
}
else {
user = prompt("Please enter your name","");
if (user!="" && user!=null){
setCookie("username",user,30);
}
}
}
</script>
<body onload="checkCookie()">
格式化
支持Emmet，输入 p 后按 Tab键试试吧！
<head> ... </head>
<body>
</body>