JavaScript 2.0-The Complete Reference, Second ... - freecodingtutorial

Constructor
This object cannot be instantiated because it defines the global context and thus has no
constructor.
Properties
Infinity Constant holding the numeric value Infinity. (IE4+ (JScript 3.0+), N4.06+
(JavaScript 1.3+), MOZ, ECMA Edition 1)
NaN Constant holding the numeric value NaN (not a number). (IE4+ (JScript 3.0+),
N4.06+ (JavaScript 1.3+), MOZ, ECMA Edition 1)
undefined Constant holding the value undefined. (IE5.5+ (JScript 5.5+), N4.06+
(JavaScript 1.3+), MOZ, ECMA Edition 1)
Methods
decodeURI(encodedURI) URI-decodes the string encodedURI and returns the
decoded string. (IE5.5+ (JScript 5.5+), MOZ/N6+ (JavaScript 1.5+), ECMA Edition 3)
decodeURIComponent(encodedURI) URI-decodes the string encodedURI and
returns the decoded string. (IE5.5+ (JScript 5.5+), MOZ/N6+ (JavaScript 1.5+), ECMA
Edition 3)
encodeURI(uri) URI-encodes the string uri, treating uri as a full URI. Legal URI
characters (for example, the :// after the protocol) are not encoded. Returns the
encoded string. (IE5.5+ (JScript 5.5+), MOZ/N6+ (JavaScript 1.5+), ECMA Edition 3)
encodeURIComponent(uriComponent) URI-encodes the string uriComponent and
returns the encoded string. All potentially problematic characters (for example, / and ?)
are encoded. (IE5.5+ (JScript 5.5+), MOZ/N6+ (JavaScript 1.5+), ECMA Edition 3)
escape(string) URI-encodes string and returns the encoded string. Using the newer
encodeURIComponent() is preferable. (IE3+ (JScript 1.0+), N2+ (JavaScript 1.0+),
MOZ)
eval(string) Executes string as JavaScript. (IE3+ (JScript 1.0+), N2+ (JavaScript 1.0+),
MOZ, ECMA Edition 1)
isFinite(value) Returns a Boolean indicating if the numeric argument value is finite.
Returns false if value is NaN. (IE4+ (JScript 3.0+), N4.06+ (JavaScript 1.3+), MOZ,
ECMA Edition 1)
isNaN(value) Returns a Boolean indicating if the numeric argument value is NaN.
(IE4+ (JScript 3.0+), N3+ (JavaScript 1.1+), MOZ, ECMA Edition 1)
parseFloat(string) Parses string as a floating-point number and returns its value. If
string cannot be converted, NaN is returned. (IE3+ (JScript 1.0+), N2+ (JavaScript
1.0+), MOZ, ECMA Edition 1)
parseInt(string) Parses string as an integer and returns its value. If string cannot be
converted, NaN is returned. (IE3+ (JScript 1.0+), N2+ (JavaScript 1.0+), MOZ, ECMA
Edition 1)
unescape(encodedString) URI-decodes encodedString and returns the decoded
string. Using the newer decodeURIComponent() method is preferable. (IE3+ (JScript
1.0+), MOZ, N2+ (JavaScript 1.0+))
Support
Supported in IE3+ (JScript 1.0+), N2+ (JavaScript 1.0+), Mozilla, ECMAScript Edition 1.
head, HTMLHeadElement (Document Object)
This object corresponds to the tag in the document. Access to this object is achieved
through standard DOM methods, though since it typically does not have an id value it is often
referenced by moving from a common starting point like document.documentElement.
Properties
This object has the following property, in addition to those in the Generic HTML Element
object found at the beginning of this section:
profile String containing a whitespace-separated list of URIs giving data properties and
legal values. (IE6+, MOZ/N6+, DOM1)