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"JavaScript from Null  is a tutorial screencast series created by Jeffrey Way. Chapter 2 has  just been published, which includes the following topics: Difference between = and =, and != and ! How a string can have methods available to it, like toUpperCase() and..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://dailyjs.com/2009/12/14/javascript-from-null/>