You can configure the settings in your Web browser to reject or warn you before accepting cookies. Following are instructions for making adjustments in several popular browsers.  

Netscape Navigator (Windows and Macintosh)
In Version 7.0  Go to the "Edit" menu and select "Preferences." In the left menu panel, click "Privacy and Security," then select the section titled "Cookies" and check one of the boxes labeled to reject some, reject all or warn you before setting incoming cookies. After making your selection, choose "OK."

In Version 4.0  Go to the "Edit" menu and select "Preferences." In the left menu panel, choose "Advanced." On the right panel, find the section titled "Cookies" and check one of the boxes labeled to reject some, reject all or warn you before setting incoming cookies. After making your selection, choose "OK."

In Version 3.0  Go to the "Options menu" and select "Network Preferences." Then select the "Protocols" tab. Locate the section titled "Show an alert" and check the box labeled "Accepting a Cookie." This means you can read each cookie as it comes in, and hit "OK" to allow it, or "Cancel" to reject it. After making your selection, choose "OK."

Internet Explorer (Windows)
In Versions 6.0 and 7.0  Go to the "Tools menu" and select "Internet Options." Choose the "Privacy" tab at the top. Go to "Settings." To disable, select "High."  Select "OK" to accept the changes.

In Version 5.0  Go to the "Tools menu" and select "Internet Options." Go to the "Security" tab at the top. Choose "Custom level." Scroll down to "Cookies" and check "Disable." Select "OK" to accept the changes.

In Version 4.0  Go to the "View" menu and select "Internet Options." Select the "Advanced" tab. Scroll down the list and find the "Cookies" section. There you can select to accept all, warn before accepting, or reject all. After making your selection, select "OK."

In Version 3.0  Go to the "View" menu and click on "Options." Select the "Advanced" tab. In the "Warnings" section, check the box labeled "Warn" before accepting cookies. This means you can read each cookie as it comes in, and hit "OK" to allow it or "Cancel" to reject it. After making your selection, choose "OK."

Internet Explorer (Macintosh)
In Version 3.0 and later  Go to the "Edit" menu and select "Preferences." In the left menu, go to "Cookies" (you may have to select the small arrow next to "Receiving Files" to see the "Cookies" option). On the right, find the pull-down menu labeled "When receiving cookies" and select "Ask for each cookie." This means you can read each cookie as it comes in, and hit "OK" to allow it or "Cancel" to reject it. After making your selection, choose "OK."

Mozilla Firefox
Go to the "Tools" menu and select "Options." Click the "Preferences" tab and find the "Privacy" panel. In the "Accept cookies from sites" section uncheck the button for "Allow." Learn more about Mozilla Firefox.

Safari
Go to the "Preferences" menu and click on the "Security" tab. In the "Accept cookies" area, check the button for "Never" Accept Cookies. Your browser is now set up to block cookies. Get additional information about Safari.

Google Chrome
Click the "Tools" menu and select "Options." Now, choose the "Under the Hood" tab and find the "Privacy" section. In the "Cookie settings" drop-down menu, select "Block all cookies." Click "Close." Your browser is now set up to block cookies. Learn more about Google Chrome.