What are Cookies?

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What are Cookies?

Web Browser and Server use HTTP protocol to communicate and HTTP is a stateless protocol. But for a commercial website, it is required to maintain session information among different pages. For example, one user registration ends after completing many pages. But how to maintain user's session information across all the web pages.

Example:

Following is the example to set a customer name in input cookie.
<html>
<head>
<script type="text/vbscript">

Function WriteCookie
   If document.myform.customer.value="" Then
      msgbox "Enter some value!"
   Else
      cookievalue=(document.myform.customer.value)
      document.cookie="name=" + cookievalue
      msgbox "Setting Cookies : " & "name=" & cookievalue
   End If
End Function

</script>
</head>
<body>
<form name="myform" action="">
Enter name: <input type="text" name="customer"/>
<input type="button" value="Set Cookie" onclick="WriteCookie()"/>
</form>
</body>
</html>
 
This will produce the following result. Now enter something in the text 
box and press the button "Set Cookie" to set the cookies.
 

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