js设置cookie有很多种方法。
第一种：（这个是w3c官网的代码）
按 Ctrl+C 复制代码
<script>
//设置cookie
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + "; " + expires;
}
//获取cookie
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
}
return "";
}
//清除cookie
function clearCookie(name) {
setCookie(name, "", -1);
}
function checkCookie() {
var user = getCookie("username");
if (user != "") {
alert("Welcome again " + user);
} else {
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
setCookie("username", user, 365);
}
}
}
checkCookie();
</script><script>
//设置cookie
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + "; " + expires;
}
//获取cookie
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i=0; i<ca.length; i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1);
if (c.indexOf(name) != -1) return c.substring(name.length, c.length);
}
return "";
}
//清除cookie
function clearCookie(name) {
setCookie(name, "", -1);
}
function checkCookie() {
var user = getCookie("username");
if (user != "") {
alert("Welcome again " + user);
} else {
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
setCookie("username", user, 365);
}
}
}
checkCookie();
</script>
按 Ctrl+C 复制代码
第二种：
<script> //JS操作cookies方法! //写cookies function setCookie(c_name, value, expiredays){ var exdate=new Date(); exdate.setDate(exdate.getDate() + expiredays); document.cookie=c_name+ "=" + escape(value) + ((expiredays==null) ? "" : ";expires="+exdate.toGMTString()); } //读取cookies function getCookie(name) { var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)"); if(arr=document.cookie.match(reg)) return (arr[2]); else return null; } //删除cookies function delCookie(name) { var exp = new Date(); exp.setTime(exp.getTime() - 1); var cval=getCookie(name); if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString(); } //使用示例 setCookie('username','Darren',30) alert(getCookie("username")); </script>
第三个例子
<html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <head> <script language="JavaScript" type="text/javascript"> function addCookie(objName, objValue, objHours){//添加cookie var str = objName + "=" + escape(objValue); if (objHours > 0) {//为0时不设定过期时间，浏览器关闭时cookie自动消失 var date = new Date(); var ms = objHours * 3600 * 1000; date.setTime(date.getTime() + ms); str += "; expires=" + date.toGMTString(); } document.cookie = str; alert("添加cookie成功"); } function getCookie(objName){//获取指定名称的cookie的值 var arrStr = document.cookie.split("; "); for (var i = 0; i < arrStr.length; i++) { var temp = arrStr[i].split("="); if (temp[0] == objName) return unescape(temp[1]); } } function delCookie(name){//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间 var date = new Date(); date.setTime(date.getTime() - 10000); document.cookie = name + "=a; expires=" + date.toGMTString(); } function allCookie(){//读取所有保存的cookie字符串 var str = document.cookie; if (str == "") { str = "没有保存任何cookie"; } alert(str); } function $(m, n){ return document.forms[m].elements[n].value; } function add_(){ var cookie_name = $("myform", "cookie_name"); var cookie_value = $("myform", "cookie_value"); var cookie_expireHours = $("myform", "cookie_expiresHours"); addCookie(cookie_name, cookie_value, cookie_expireHours); } function get_(){ var cookie_name = $("myform", "cookie_name"); var cookie_value = getCookie(cookie_name); alert(cookie_value); } function del_(){ var cookie_name = $("myform", "cookie_name"); delCookie(cookie_name); alert("删除成功"); } </script> </head> <body> <form name="myform"> <div> <label for="cookie_name"> 名称 </label> <input type="text" name="cookie_name" /> </div> <div> <label for="cookie_value"> 值 </lable> <input type="text" name="cookie_value" /> </div> <div> <label for="cookie_expireHours"> 多少个小时过期 </lable> <input type="text" name="cookie_expiresHours" /> </div> <div> <input type="button" value="添加该cookie" οnclick="add_()"/><input type="button" value="读取所有cookie" οnclick="allCookie()"/><input type="button" value="读取该名称cookie" οnclick="get_()"/><input type="button" value="删除该名称cookie" οnclick="del_()"/> </div> </form> </body> </html>
