JS operation cookies include (reading, adding and deleting)_javascript skills

I have always simply used js to implement some cookie operations. Today I have sorted out js's use of cookie operating systems, including: js reading cookies, js adding cookies, and js deleting cookies. Examples are as follows:

Copy code The code is as follows:

function addCookie(objName,objValue,objHours){//Add cookie
var str = objName "=" escape(objValue);
if(objHours > 0){//When it is 0, the expiration time is not set, and the cookie disappears automatically when the browser is closed
var date = new Date();
var ms = objHours*3600*1000;
date.setTime(date.getTime() ms);
str = "; expires=" date.toGMTString();
}
document.cookie = str;
alert("Add cookie successful");
}
function getCookie(objName){//Get the value of the cookie with the specified name
var arrStr = document.cookie.split("; ");
for(var i = 0;i var temp = arrStr[i].split("=");
if(temp[0] == objName) return unescape(temp[ 1]);
}
}
function delCookie(name){//In order to delete the cookie with the specified name, you can set its expiration time to a past time
var date = new Date ();
date.setTime(date.getTime() - 10000);
document.cookie = name "=a; expires=" date.toGMTString();
}
//Read Take out all cookie strings
function allCookie(){//Read all saved cookie strings
var str = document.cookie;
if(str == ""){
str = "No cookies saved";
}
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("Delete successfully");
}

//Add 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 unit is days
str =";expires=" date.toGMTString();
}
if(path!=""){
str =";path=" path;//Specify the directory where cookies can be accessed
}
if(domain!=""){
str =";domain=" domain;//Specify the domain that can access cookies
}
document.cookie=str;
}
//Get cookies
function getCookie(name){
var str=document.cookie.split(";")
for(var i=0;ivar str2=str[i].split("=" );
if(str2[0]==name)return unescape(str2[1]);
}
}
//Delete cookie
function delCookie(name){
var date=new Date();
date.setTime(date.getTime()-10000);
document.cookie=name