@March 15, 2008, 1:22 a.m.
|input||Firefox/Netscape/NN 4 IE 4 ECMA n/a|
This is the main string against which a regular expression is compared. If the main string is handed to the regular expression operation as a parameter to a method, this value is null. The short version is $_ (dollar sign, underscore).
RegExp.input = "Four score and seven years ago...";
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