JavaScript and Ajax for the Web: Visual QuickStart Guide, Seventh Edition

Deleting Cookies

At some point, you’re going to want to delete a cookie or many cookies in a cookie record. It’s fairly easy to do; one technique that works well is to simply set the cookie’s expiration date to a date in the past, which causes the browser to delete it automatically. Script 10.7 shows how to force your cookies to become stale.

To delete cookies:

1.	var cookieCt = 0; This script is going to keep track of how many cookies we’ve deleted, so we start off by creating the cookieCt variable and setting it to zero.
2.	if (document.cookie != "" && confirm ("Do you want to delete the cookies?")) { This test first checks to make sure that the cookie doesn’t contain a null value, that is, there are some cookies. If the test shows that the ...