Also, if the user changes browsers or rearranges folders, the cookie file can be lost. Although you have some control over the date, cookies expire so you can't count on old information still being around. The cookie may be inaccurate in a shared environment where several people share the same machine. The size limit on each cookie can thwart some disign. How does a cookie get set up.
Cookies become part of the headers that the server and browser place at the beginning of Web pages.
As the user loads a page, sever CGI scripts includes information to access or set up cookies. Javascript can be embedded in the web page to access or store information. This quick guide will only deal with the javascript method. Note that text that includes punctuation marks or spaces will be encoded with hexadecimal codes to reflect those characters. Here is part of the cookie on my computer to illustrate.