https://gold.bullionvault.jp/javascript/cookies.js

1// Cookies: see http://www.netspade.com/articles/javascript/cookies.xml
2//		  and http://www.quirksmode.org/js/cookies.html
3
4// This is best-effort only, as we need the domain and path both to match exactly to delete
5// the cookie and this information is not available to Javascript or the server.
6// We don't have to exclude JSESSIONID as it's marked HttpOnly
7function clearAllCookies() {
8	var cookies = document.cookie.split(';');
9	for (var i = 0; i < cookies.length; i++) {
10		eraseCookie(cookies[i].split('=')[0].trim(), '/');
11	}
12}
13
14function getCookie(name) {
15	var match = (' ' + document.cookie).match(new RegExp(' ' + name + '=([^;]+)'));
16	var ret = match && match[1] || '';
17	ret = unescape(ret);
18	ret = name === 'logintest' ? ret : ret.replace(/^"/, '').replace(/"$/, '');
19	return ret;
20}
21
22function setCookieFull(name, value, expires, path, domain, secure) {
23	setRawCookieFull(name, escape( value ), expires, path, domain, secure);
24}
25
26function setRawCookieFull(name, value, expires, path, domain, secure) {
27	// we can only set persistent cookies with the user's permission
28	var allowPersistentCookies = (name === "allowPersistentCookies" && value === "1")
29		|| (!(name === "allowPersistentCookies" && value === "0") && getCookie("allowPersistentCookies") === "1")
30		|| (expires && expires < new Date());
31	var expiry = allowPersistentCookies && expires ? expires.toGMTString() : "-1";
32
33	var curCookie = name + "=" + value +
34		((expires) ? "; expires=" + expiry : "") +
35		((path) ? "; path=" + path : "") +
36		((domain) ? "; domain=" + domain : "") +
37		((secure) ? "; secure" : "");
38	document.cookie = curCookie;
39}
40
41function setCookie(name, value, path) {
42	var expires = new Date();
43	expires.setTime(expires.getTime() + (365 * 24 * 60 * 60 * 1000));
44	path = path ? path : "/";
45	setCookieFull(name, value, expires, path);
46}
47
48function eraseCookie(name, path, domain) {
49	var expires = new Date();
50	expires.setTime( expires.getTime() - 1 );
51	setCookieFull(name, "", expires, path, domain);
52}