JavaScript Compatibility

Table 2 shows the JavaScript compatibility of different browsers on several commonly used platforms.

Table 2: JavaScript compatibility for different browsers on different platforms

Platform	Browser	JavaScript version
Windows	MS IE 5.5	1.5 (ECMA 3)
Windows	MS IE 5.0	1.3 (ECMA 2)
Windows	MS IE 4.0	1.2 (ECMA 1)
Windows	MS IE 3.0	1.0
Windows	MS IE 2.0	Not supported
Windows	NN 6	1.5 (ECMA 3)
Windows	NN 4.7 / 4.5	1.3 (ECMA 2)
Windows	NN 4.0	1.2
Windows	NN 3.0	1.1
Windows	NN 2.0	1.0
Mac	MS IE 5.0	1.3 (ECMA 2)
Mac	MS IE 4.0	1.2 (ECMA 1)
Mac	MS IE 3.0	1.0
Mac	NN 6	(ECMA 3)
Mac	NN 4.7 / 4.5	(ECMA 2)
Mac	NN 4.0	1.2
Mac	NN 3.0	1.1
Mac	NN 2.0	1.0
Unix	NN 6	1.5 (ECMA 3)
Unix	NN 4.7 / 4.5	1.3 (ECMA 2)
Unix	NN 4.0	1.2
Unix	NN 3.0	1.1
Unix	NN 2.0	1.0

In the table 2 following abbreviations have been used:

• MS IE - Microsoft Internet Explorer
• NN - Netscape Navigator
• ECMA - Prior 1994, known as European Computer Manufacturers Association. Now known as ECMA International - European Association for Standardizing Information and Communication Systems.