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Manipulation Cookies in Java Script

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Manipulation Cookies in Java Script

A Cookie is nothing but a small text file that’s stored in your browser. It contains some data such as:

1.       A name value pair containing the actual data.

2.       An expiry date after which it is no longer valid.

3.       The domain and path of the server it should be sent to.

We can use Cookie:

Ø  State Maintenance/Persistence across different pages of the site, for Http is a state less protocol which means after sending any web page server forget which page he sent.

Ø  To allow user-side customization of web information, to serve a personalized site.

In this demonstration we learn how to create cookie, delete cookie and read cookie.

Creating cookie

function createCookie() {

            var date = new Date();

            var days = 1;

            date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));

            document.cookie = "ck1" + "Hello Dear" + date.toGMTString();

            document.write("Cookie created successfully.");


Reading Cookie

function readCookie() {

            var cookName = "ck1" + "=";

            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, c.length);

                if (c.indexOf(cookName) == 0)

                    document.write(c.subString(cookName.length , c.length);




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