myObject.toString() in ECMAScript 262

For most objects, returns the string "[object "+className+"]". For internal objects, returns the following:

Array

Each member of the array has toString() called on it, and the results are joined together with commas. Equivalent to myArray.join().

Boolean

Returns "true" for true, "false" for false.

Date

The format of the string value returned depends on the implementation. Often a human-readable string such as "Mon Nov 17 2003 13:56:48 GMT-0700"

Function

The format of the string value returned depends on the implementation. Often a source-code representation of the function.

Number

The number converted to a string value. (See the specific entry for Number.toString(radix).)

String

The string's value.