JavaScript Design

Adding More Attributes

Cookies have the following four optional attributes:

• expires Cookie expiration date

• path Associated web pages

• domain Setting for multiple domains

• secure Boolean value for secure protocol

You can set some, all, or none of these attributes. Each attribute is placed in the order of this list, separated by semicolons. No labels identify the attributes, so you must remember the order and place dummy attributes if any are skipped.

Setting the Expiration Date

If expires is not set, your cookie is dropped at the end of the session; while it is optional, a cookie that evaporates at the end of the session where it is set is of little practical value. Therefore, most designers set the expiration date of cookies. Some cookies have ...