Feature

Cookie Name

Purpose

What will happen if you do not use this?

Does the Cookie Persist?

Is the Cookie Essential?

Session

ASP.NET_SessionId

As visitors browse and interact with the Libraries NI website, activity such as completing a form is recorded on the web server and this token allows us to refer to the user session data on the server between pages.

http://support.microsoft.com/kb/899918

No loss of function but there will be a very minor delay before each page load as authentication would be triggered for every page visited whereas the cookie instantly confirms visitors as anonymous.

No

Yes

Cookies below are set by Google Analytics

Google Analytics is a trending and analysis tool, not an accounting software program or a report of our server logs. It relies on data collection via JavaScript and cookie placements.

__utma

This cookie is typically written to the browser upon the first visit to your site from that web browser. If the cookie has been deleted by the browser operator, and the browser subsequently visits your site, a new __utma cookie is written with a different unique ID. This cookie is used to determine unique visitors to our site and it is updated with each page view. Additionally, this cookie is provided with a unique ID that Google Analytics uses to ensure both the validity and accessibility of the cookie as an extra security measure.

Statistical info will not be available to Libraries NI

Yes

No

__utmb

This cookie is used to establish and continue a user session with our site. When a user views a page on our site, the Google Analytics code attempts to update this cookie. If it does not find the cookie, a new one is written and a new session is established. Each time a user visits a different page on your site, this cookie is updated to expire in 30 minutes, thus continuing a single session for as long as user activity continues within 30-minute intervals. This cookie expires when a user pauses on a page on our site for longer than 30 minutes. We can modify the default length of a user session with the _setSessionCookieTimeout() method.

Statistical info will not be available to Libraries NI

No

No

__utmc

This cookie is no longer used by the ga.js tracking code to determine session status.

Historically, this cookie operated in conjunction with the __utmb cookie to determine whether or not to establish a new session for the user. For backwards compatibility purposes with sites still using the urchin.js tracking code, this cookie will continue to be written and will expire when the user exits the browser.

Statistical info will not be available to Libraries NI

No

No

__utmz

This cookie stores the type of referral used by the visitor to reach the Libraries NI site, whether via a direct method, a referring link, a website search, or a campaign such as an ad or an email link. It is used to calculate search engine traffic, ad campaigns and page navigation within the Libraries NI site. The cookie is updated with each page view to the Libraries NI site.

Statistical info will not be available to Libraries NI

Yes

No

__utmv

This cookie is not normally present in a default configuration of the tracking code. The __utmv cookie passes the information provided via the _setVar() method, which we use to create a custom user segment. This string is then passed to the Analytics servers in the GIF request URL via the utmcc parameter. This cookie is only written if we have added the _setVar() method for the tracking code on our website page.

Statistical info will not be available to Libraries NI

Yes

No