The Boolean Object

The Boolean Object

As its name makes clear, the Boolean object handles Boolean values. There's not really a great deal to this object, but we should cover it for the sake of completeness. You can see the properties of the Boolean object in Table 19.7 and its methods in Table 19.8.

Table 19.7. The Properties of the Boolean Object

Property	NS2	NS3	NS4	NS6	IE3a	IE3b	IE4	IE5	IE5.5	IE6
constructor		x	x	x		x	x	x	x	x
	Read/write
	This property specifies the function that creates an object.
prototype		x	x	x		x	x	x	x	x
	Read/write
	This property returns a reference to the object's prototype. You use the prototype property to provide base functionality to a class of objects. See "Using the prototype Property" in this chapter.

Table 19.8. The Methods of the Boolean Object

Method	NS2	NS3	NS4	NS6	IE3a	IE3b	IE4	IE5	IE5.5	IE6
toString		x	x	x		x	x	x	x	x
	Returns: String
	This method returns the string "true" or "false" to match the
	Boolean value of the object.
	Syntax: boolean .toString() .
valueOf		x	x	x		x	x	x	x	x
	Returns: Number
	This method returns a Boolean value of true or false to match the
	Boolean value of the object.
	Syntax: boolean .valueOf() .