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Navigation button

A graphic image, generally in a GIF or JPEG format, that links to a single URL.

noframes

An element commonly used on framed pages. Content placed between the NOFRAMES tags display when a browser does not support frames or is configured not to display frames. Because almost all browsers support frames, search engines either ignore or place low weight on the content inside the NOFRAMES tags.

noscript

If a browser does not support a scripting language or if an end user has disabled client-side scripting in a browser, content between the NOSCRIPT tags is displayed. This element enables web developers to display alternative content in the event a script is not executed.