JS Operation Cookie

A cookie is a variable stored on a visitor's computer. This cookie is sent whenever a page is requested by the same computer through a browser. You can use JavaScript to create and retrieve the value of a cookie.

Add a cookie

Describe:

Create a new cookie to be managed by the browser!

Parameter description:

Name-Key of the key-value pair, which uniquely marks a value

Value-values of key-value pairs, contents of the cookie Store

Expdays-cookie Expiration Time (active time)

function Setcookie (name, value, expdays) {    var expdate = new Date ();//Set cookie expiration date    expdate.setdate ( Expdate.getdate () + expdays); Add a cookie    document.cookie = name + "=" + Escape (value) + "; expires=" + expdate.toutcstring ();}

Get cookies

Describe:

Based on the name of the parameter, get the value of the corresponding value in the cookie

function GetCookie (name) {//Gets the name in the cookie starting and ending position    var start = document.cookie.indexOf (name + "=");    if (Start! =-1) {        start = start + name.length + 1;//Gets the terminating position of value        var end = Document.cookie.indexOf (";", start); C6/>if (end = =-1) end = Document.cookie.length; Intercepts the value of the cookie and returns the return        unescape (document.cookie.substring (Start, end));    }    Return "";}

　　

Delete Cookies

Describe:

Delete a cookie based on name (set to expire immediately)

function Delcookie (name) {    Setcookie (name, "",-1);}

　　

Extended Features:

Pre-agreed, same key, multiple value,value separated by commas (,)

Determine if a value already exists

function Isexistvalue (key, Val) {  var value = GetCookie (key);  var index = Value.indexof (val);  return Index! =-1;}

　　

　　

JS Operation Cookie