w3school代码
/**
* 添加/修改cookie
* @param c_name
* @param value
* @param expireTimes
*/
function setCookie(c_name, value, expireTimes) {
var exdate = new Date();
//exdate.setDate(exdate.getDate()+expiredays);
exdate.setTime(exdate.getTime() + expireTimes);
document.cookie = c_name
+ "="
+ escape(value)
+ ((expireTimes == null) ? "" : ";expires="
+ exdate.toGMTString());
}
/**
* 查询cookie
* @param c_name
* @returns
*/
function getCookie(c_name) {
if (document.cookie.length > 0) {
c_start = document.cookie.indexOf(c_name + "=");
if (c_start != -1) {
c_start = c_start + c_name.length + 1;
c_end = document.cookie.indexOf(";", c_start);
if (c_end == -1)
c_end = document.cookie.length;
return unescape(document.cookie.substring(c_start, c_end));
}
}
return "";
}
/**
* 删除cookie
* @param c_name
*/
function removeCookie(c_name) {
setCookie(c_name, "", -1);
}
调用样例:
setCookie("test1","test1",2*3600*1000); //2小时过期
alert(getCookie("test1"));
注意:
chrome浏览器在本地获取不到cookie。
此外cookie还有路径,域的概念。
JavaScript Cookies
http://www.w3school.com.cn/js/js_cookies.asp