| Netscape 2.x | Netscape 3.x | Netscape 4.x | Netscape 4.06+ | MSIE 3.x | MSIE 4.x | MSIE 5.x | Opera x.x |
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| 1.0 | 1.1 | 1.2 | 1.3 | 1.0 | 1.2 | ?.? | ?.? |
Note: Please be advised that the scripting engine can be changed in MSIE (see http://msdn.microsoft.com/scripting/)