9.1 建立第一个 cookie
- cookie 是具有特定格式的文本字符串；
- cookieName=cookieValue； expires=expirationDateGMT；path=URLpath；domain=siteDomain；
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
window.onload = nameFieldInit;
function nameFieldInit() {
var userName = "";
if (document.cookie != "") {
var cookieInfo = document.cookie.split("=");
userName = cookieInfo[1];
}
document.getElementById("nameID").value = userName;
}
function setCookie() {
var expireDate = new Date();
expireDate.setMonth(expireDate.getMonth() + 6);
var userName = document.getElementById("nameID").value;
document.cookie = "cookieName=" + userName + ";expires=" + expireDate.toGMTString();
}
</script>
</head>
<body>
<p>JavaScript</p>
<form id="cookieForm" onsubmit="return setCookie()">
<label>name:<input id="nameID" name="name"></label>
<label>password:<input id="pwd" name="pwd"></label>
<input type="submit" value="登录">
</form>
</body>
</html>