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From: FAQ server on 5 Aug 2010 19:00
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FAQ Topic - How do I access a property of an object using
a string?
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There are two ways to access properties: dot notation and square bracket
notation. What you are looking for is the square bracket notation in
which the dot, and the identifier to its right, are replaced with a set
of square brackets containing a string. The value of the string matches
the identifier. For example:-

//dot notation
var bodyElement = document.body;

//square bracket notation, using an expression
var bodyElement = document["bo"+"dy"];

<URL: http://jibbering.com/faq/notes/square-brackets/>


The complete comp.lang.javascript FAQ is at
http://jibbering.com/faq/

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