Cookies are small text files stored on a user's computer that contain information about a user's browsing activity. They allow websites to store and retrieve information from the user's computer through their browser. There are three main types of cookies: name cookies that store a user's name for a personalized welcome message, password cookies that store a password for automatic logins, and date cookies that store a user's previous visit date. Cookies have advantages like being simple to implement and not requiring server resources, but also disadvantages like lack of security, size limitations, and ability for users to refuse or delete cookies.

1. COOKIES
A Cookie is a variable that
is stored on the visitor’s
computer.

2. Each time the same computer request a
page with a browsers it will send the cookie
too. With java script, you can both create
and retrieve cookie values.
Cookies store information about visitor’s to
web site. This data
(i.e. Username, password and which part of
the site were used) is updated with every
visit.
Cookies were invented in 1994 by a 24
year old Programmer named Lou Montulli,
who claims to have invented the (blink)tag.

3. Types of Cookies
There are 3 types,
1] Name Cookie:
The first time a visitor arrives to your web
page. He or She must fill in her/his name. The
name is then stored in a cookie. Next time the
visitor arrives at your page. He or she could set a
welcome message like ”welcome John Deol”.
The name is retriered from the stored cookie.

4. 2] Password cookie
The first time a visitor arrives to
your web page, he or she must fill in a
password. The password is then stored
in a cookie. Next time the visitor arrives
at your page. The password is returned
from the cookie.
3] Date cookie:
The first time a visitor arrives
to your web page, the current date is
stored in a cookie. Next time the
visistors arrives at your page, he or she
could get a message like “your last visit
web on Tuesday August 11, 2005!” The

5. Advantages
Disadvantage
s
• Its very simple to use
and implement.
• No server resources
required.
• Configured expiration
rules.
• Browser takes care of
sending the data.
• It stores data in a
simple text format so
its not secure at all.
• User-configured
refusal.
• There is a size limit
for cookies data
[4KB.]

6. limitations
• No security for sensitive data.
• Cookies are browser specific.
• User can delete a cookies.
• Not all clients support them. It can be
disabled on user browser.
• Only hold small amount of information.