The following sentence works fine in Javascript

if ((ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z" ) )

but if I change to :

if ((ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z" ) || (ch >= "0" &&
ch <= "9" ))

The   (ch >= "0" && ch <= "9" ) part won't functioning.


Franco

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