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Core JavaScript 1.5 Reference, Global Properties - MDC

Link text
Infinity http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Properties:Infinity
NaN http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Properties:NaN
undefined http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Properties:undefined