关于 如何判断-浏览器首次访问判断
关于 如何判断-浏览器首次访问判断
没看懂,只会用,先记下来,~汗!!!!
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<meta charset="utf-8">
<title>页面首次访问判断</title>
</head>
<body>
<h1><a href="http://www.thevv.top">GO</a></h1>
<script language ="javascript" type ="text/javascript" >
//1浏览器关闭则window.name为空,可以实现跨域,数据传递
alert((window.name == "" ? "是" : "不是") + "第一次开这个窗口!")
window.name = "00";
//cookie判断
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 != "") {
//不是首次访问
alert("Welcome again " + user);
} else {
//首次访问
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
setCookie("username", user, 2 / (3600 * 24));
}
}
}
window.onload = function() {
checkCookie()
}
</script>
</body></html>