Wikipedia:

As explained by JavaScript guru Douglas
Crockford<http://en.wikipedia.org/wiki/Douglas_Crockford>in his talk
entitled
*The JavaScript Programming Language* on YUI
Theater<http://en.wikipedia.org/w/index.php?title=YUI_Theater&action=edit&redlink=1>,
"[Microsoft] did not want to deal with Sun about the trademark issue, and so
they called their implementation JScript. A lot of people think that JScript
and JavaScript are different but similar languages. That's not the case.
They are just different names for the same language, and the reason the
names are different was to get around trademark issues."

http://en.wikipedia.org/wiki/JScript#Comparison_to_JavaScript

2010/12/7 Loic Giraudel <[email protected]>

> IE8 has JScript 5.8 but Javascript 1.3.
>
> JScript and Javascript is not the same thing.
>
> 2010/12/7 Acaz Souza Pereira <[email protected]>
>
>> This is very confusing.
>>
>>
>> If you see what version of javascript in:
>>
>> firefox 3.6: *1.8*
>> opera 10: *2*
>> IE 8: *1.3* (why this is 1.3? JScript version in IE8 is 5.8)
>> chrome 8: 1.7
>>
>>
>>
>> 2010/12/7 David Flanagan <[email protected]>
>>
>> ECMAScript is the standard that defines the language commonly known as
>>> JavaScript.  Version 3 has been stable for about a decade.  Version 1 is
>>> very, very old.  Version 2 was just a minor bug release.  Version 4 was
>>> never released. Version 5 is brand new and is being implemented currently.
>>>  Firefox 4 seems likely to be the first browser that ships with an ES5
>>> implementation.
>>>
>>> "JavaScript" is a name with trademark restrictions, or something, which
>>> is why Microsoft calls their version "JScript".  Version numbers following
>>> "JavaScript" are Mozilla-specific.
>>>
>>> All you really need to know is that all browsers have supported ES3 for
>>> years and all will eventually support ES5.  I don't think IE9 will support
>>> ES5, however, so we may have to wait for IE10 before we have a full set of
>>> current browsers that support the language.
>>>
>>>    David Flanagan
>>>
>>>
>>>
>>> On 12/07/2010 06:24 AM, Acaz Souza Pereira wrote:
>>>
>>>> I know that have ECMAScript 3th edition and 5th edition.
>>>>
>>>> But exist JavaScript 1.5 and 1.6, what the purpose of each?
>>>>
>>>> ECMAScript is all about language syntax? I don't understand.
>>>>
>>>> Thank you guys.
>>>>
>>>>
>>>>
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>>>
>>>
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>>
>>
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