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How you change your browser settings depends on your browser, but are typically called "Options", "Settings" or "Preferences", and are found under the "Edit" or "Tools" menus of your browser.
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This site uses Frames (windows within other windows); without them this site will not work.
Frames are now such an established and normal part of web-sites that it is unlikely that your browser offers you the option of disabling them. If it does, ensure that they are enabled.