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js操作COOKIES

2013-07-31 11:32 302 查看
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<title>cookie处理函数练习(为我所写，非我所想:改善面向对象)</title>
<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();
}
//读取出来所有的cookie字筗串了
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
.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>
//添加cookie
function addCookie(name,value,expires,path,domain){
var str=name+"="+escape(value);
if(expires!=""){
var date=new Date();
date.setTime(date.getTime()+expires*24*3600*1000);//expires单位为天
str+=";expires="+date.toGMTString();
}
if(path!=""){
str+=";path="+path;//指定可访问cookie的目录
}
if(domain!=""){
str+=";domain="+domain;//指定可访问cookie的域
}
document.cookie=str;
}
//取得cookie
function getCookie(name){
var str=document.cookie.split(";")
for(var i=0;i<str.length;i++){
var str2=str[i].split(”=”);
if(str2[0]==name)return unescape(str2[1]);
}
}
//删除cookie
function delCookie(name){
var date=new Date();
date.setTime(date.getTime()-10000);
document.cookie=name+”=n;expire=”+date.toGMTString();
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