HTML

XML

DTD

CSS

Visual Filter

JavaScript

Java

ASP

SSI

.NET

	Legend
n  version n is supported  n version n is not supported  n  support for version n is not known

+

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Addition / String concatenation

ECMAScript (Standard ECMA-262)	x
Microsoft JScript	1 2 3 4 5.0 5.5
Netscape Navigator	1 2 3 4 6
Netscape JavaScript	1.0 1.1 1.2 1.3 1.4
Opera	2 3 4