JS & DOM Reference

JavaScript Objects

The top-level properties and functions can be used with all the built-in JavaScript objects.

F: Firefox, IE: Internet Explorer

Function	Description	F	IE
decodeURI()	Decodes a URI	1	5.5
decodeURIComponent()	Decodes a URI component	1	5.5
encodeURI()	Encodes a URI	1	5.5
encodeURIComponent()	Encodes a URI component	1	5.5
escape()	Encodes a string	1	3
eval()	Evaluates a string and executes it as if it was script code	1	3
isFinite()	Checks if a value is a legal number	1	4
isNaN()	Checks if a value is not a legal number	1	3
Number()	Converts an object's value to a number	1
parseFloat()	Parses a string and returns a floating point number	1	3
parseInt()	Parses a string and returns an integer	1	3
String()	Converts an object's value to a string	1
unescape()	Decodes a string encoded by escape()	1	3

Function	Description	F	IE
Infinity	A numeric value that represents positive/negative infinity	1	4
undefined	Indicates that a variable has not been assigned a value	1	5.5

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