<s>
JScript	B-Language
.NET	I-Language
is	O
a	O
.NET	B-Application
programming	O
language	O
developed	O
by	O
Microsoft	O
.	O
</s>
<s>
The	O
primary	O
differences	O
between	O
JScript	B-Language
and	O
JScript	B-Language
.NET	I-Language
can	O
be	O
summarized	O
as	O
follows	O
:	O
</s>
<s>
Firstly	O
,	O
JScript	B-Language
is	O
a	O
scripting	B-Language
language	I-Language
,	O
and	O
as	O
such	O
programs	B-Application
(	O
or	O
more	O
suggestively	O
,	O
scripts	O
)	O
can	O
be	O
executed	O
without	O
the	O
need	O
to	O
compile	O
the	O
code	O
first	O
.	O
</s>
<s>
This	O
is	O
not	O
the	O
case	O
with	O
the	O
JScript	B-Language
.NET	I-Language
command-line	O
compiler	O
,	O
since	O
this	O
next-generation	O
version	O
relies	O
on	O
the	O
.NET	B-Application
Common	O
Language	O
Runtime	B-Library
(	O
CLR	O
)	O
for	O
execution	O
,	O
which	O
requires	O
that	O
the	O
code	O
be	O
compiled	O
to	O
Common	O
Intermediate	O
Language	O
(	O
CIL	O
)	O
,	O
formerly	O
called	O
Microsoft	O
Intermediate	O
Language	O
(	O
MSIL	O
)	O
,	O
code	O
before	O
it	O
can	O
be	O
run	O
.	O
</s>
<s>
Nevertheless	O
,	O
JScript	B-Language
.NET	I-Language
still	O
provides	O
full	O
support	O
for	O
interpreting	O
code	O
at	B-Library
runtime	I-Library
(	O
e.g.	O
,	O
via	O
the	O
Function	O
constructor	O
or	O
the	O
eval	O
function	O
)	O
and	O
indeed	O
the	O
interpreter	O
can	O
be	O
exposed	O
by	O
custom	O
applications	O
hosting	O
the	O
JScript	B-Language
.NET	I-Language
engine	O
via	O
the	O
VSA	O
interfaces	O
.	O
</s>
<s>
Secondly	O
,	O
JScript	B-Language
has	O
a	O
strong	O
foundation	O
in	O
Microsoft	O
's	O
ActiveX/COM	O
technologies	O
,	O
and	O
relies	O
primarily	O
on	O
ActiveX	B-Application
components	I-Application
to	O
provide	O
much	O
of	O
its	O
functionality	O
(	O
including	O
database	O
access	O
via	O
ADO	B-Library
,	O
file	O
handling	O
,	O
etc	O
.	O
</s>
<s>
)	O
,	O
whereas	O
JScript	B-Language
.NET	I-Language
uses	O
the	O
.NET	B-Application
Framework	I-Application
to	O
provide	O
equivalent	O
functionality	O
.	O
</s>
<s>
For	O
backwards-compatibility	O
(	O
or	O
for	O
where	O
no	O
.NET	B-Application
equivalent	O
library	O
exists	O
)	O
,	O
JScript	B-Language
.NET	I-Language
still	O
provides	O
full	O
access	O
to	O
ActiveX	B-Application
objects	I-Application
via	O
.NET	B-Application
/	O
COM	B-Device
Interop	I-Device
using	O
both	O
the	O
ActiveXObject	B-Application
constructor	O
and	O
the	O
standard	O
methods	O
of	O
the	O
.NET	B-Application
Type	O
class	O
.	O
</s>
<s>
Although	O
the	O
.NET	B-Application
Framework	I-Application
and	O
.NET	B-Application
languages	O
such	O
as	O
C#	B-Application
and	O
Visual	B-Language
Basic	I-Language
.NET	I-Language
have	O
seen	O
widespread	O
adoption	O
,	O
JScript	B-Language
.NET	I-Language
has	O
never	O
received	O
much	O
attention	O
,	O
by	O
the	O
media	O
or	O
by	O
developers	O
.	O
</s>
<s>
It	O
is	O
not	O
supported	O
in	O
Microsoft	O
's	O
premier	O
development	O
tool	O
,	O
Visual	O
Studio	O
.NET	B-Application
.	O
</s>
<s>
However	O
,	O
ASP.NET	B-Application
supports	O
JScript	B-Language
.NET	I-Language
.	O
</s>
<s>
The	O
following	O
are	O
prime	O
examples	O
of	O
language	O
differences	O
between	O
JScript	B-Language
.NET	I-Language
and	O
other	O
.NET	B-Application
languages	O
,	O
including	O
comparisons	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
does	O
not	O
require	O
a	O
main( )	O
function	O
that	O
the	O
operating	O
system	O
must	O
call	O
directly	O
when	O
executing	O
a	O
JScript	B-Language
.NET	I-Language
application	O
,	O
as	O
such	O
,	O
JScript	B-Language
.NET	I-Language
program	O
flow	O
can	O
be	O
based	O
on	O
global	O
code	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
,	O
because	O
of	O
its	O
very	O
loose	O
type	O
checking	O
system	O
can	O
be	O
very	O
easy	O
to	O
learn	O
,	O
since	O
the	O
convention	O
of	O
explicit	O
type	O
declaration	O
is	O
not	O
required	O
at	O
all	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
does	O
not	O
require	O
explicit	O
references	O
to	O
the	O
.NET	B-Application
Framework	I-Application
Base	O
Class	O
Library	O
,	O
as	O
certain	O
functions	O
found	O
in	O
earlier	O
versions	O
of	O
JScript	B-Language
are	O
present	O
in	O
JScript	B-Language
.NET	I-Language
(	O
e.g.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
is	O
closely	O
linked	O
to	O
C	B-Language
syntax	O
,	O
and	O
is	O
thus	O
very	O
easy	O
to	O
learn	O
for	O
C#	B-Application
,	O
Java	B-Language
or	O
C++	B-Language
developers	O
.	O
</s>
<s>
While	O
JScript	B-Language
.NET	I-Language
can	O
be	O
used	O
to	O
create	O
Windows	O
Forms	O
applications	O
,	O
JScript	B-Language
.NET	I-Language
will	O
have	O
some	O
trouble	O
,	O
as	O
delegates	O
can	O
only	O
be	O
consumed	O
in	O
JScript	B-Language
.NET	I-Language
and	O
not	O
created	O
.	O
</s>
<s>
Thus	O
,	O
custom	O
events	O
are	O
hard	O
to	O
emulate	O
in	O
JScript	B-Language
.NET	I-Language
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
does	O
not	O
require	O
a	O
main( )	O
function	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
does	O
not	O
require	O
explicit	O
type	O
declaration	O
on	O
variables	O
.	O
</s>
<s>
(	O
In	O
C++	B-Language
,	O
the	O
use	O
of	O
templates	O
and	O
generics	O
can	O
be	O
compared	O
to	O
this	O
,	O
loosely	O
emulated	O
with	O
template	O
specialization	O
,	O
etc	O
.	O
)	O
</s>
<s>
JScript	B-Language
.NET	I-Language
also	O
does	O
not	O
require	O
explicit	O
type	O
casts	O
on	O
variable	O
use	O
in	O
the	O
program	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
syntax	O
and	O
lexical	O
conventions	O
are	O
similar	O
to	O
Java	B-Language
in	O
that	O
both	O
are	O
derived	O
from	O
C	B-Language
.	O
JScript	B-Language
was	O
originally	O
Microsoft	O
's	O
implementation	O
of	O
ECMAScript	B-Language
,	O
which	O
is	O
more	O
commonly	O
known	O
as	O
JavaScript	B-Language
,	O
though	O
it	O
is	O
unrelated	O
to	O
Java	B-Language
.	O
</s>
<s>
Thus	O
,	O
users	O
of	O
Java	B-Language
and	O
other	O
C-derived	O
languages	O
will	O
find	O
JScript	B-Language
easier	O
to	O
learn	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
allows	O
developers	O
to	O
use	O
untyped	O
variables	O
,	O
and	O
can	O
sometimes	O
infer	O
their	O
type	O
from	O
their	O
usage	O
to	O
optimize	O
the	O
compiled	O
code	O
.	O
</s>
<s>
On	O
the	O
other	O
hand	O
,	O
Java	B-Language
requires	O
all	O
variables	O
to	O
be	O
typed	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
can	O
add	O
properties	O
and	O
methods	O
to	O
objects	O
in	O
run-time	B-Library
,	O
while	O
Java	B-Language
objects	O
always	O
conform	O
to	O
their	O
declared	O
interface	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
supports	O
global	O
variables	O
,	O
something	O
Java	B-Language
does	O
not	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
allows	O
developers	O
to	O
declare	O
variables	O
and	O
functions	O
with	O
type	O
information	O
(	O
e.g.	O
,	O
var	O
x	O
:	O
String	O
;	O
)	O
,	O
while	O
type	O
information	O
for	O
JScript	B-Language
's	O
variables	O
and	O
functions	O
can	O
not	O
be	O
declared	O
(	O
e.g.	O
,	O
var	O
x	O
;	O
)	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
scripts	O
are	O
not	O
interpreted	O
,	O
but	O
executed	O
independently	O
.	O
</s>
<s>
When	O
executed	O
,	O
a	O
JScript	B-Language
.NET	I-Language
application	O
will	O
invoke	O
the	O
CLR	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
can	O
be	O
run	O
without	O
the	O
presence	O
of	O
a	O
browser	O
or	O
another	O
scripting	B-Language
engine	I-Language
as	O
the	O
compiler	O
can	O
generate	O
standalone	O
executables	B-Application
and	O
assemblies	O
.	O
</s>
<s>
However	O
these	O
still	O
require	O
.NET	B-Application
Framework	I-Application
to	O
be	O
installed	O
in	O
order	O
to	O
run	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
provides	O
access	O
to	O
the	O
.NET	B-Application
Framework	I-Application
BCL	O
(	O
Base	O
Class	O
Library	O
)	O
,	O
providing	O
much	O
more	O
functionality	O
.	O
</s>
<s>
JScript	B-Language
.NET	I-Language
is	O
only	O
available	O
as	O
a	O
scripting	B-Language
language	I-Language
for	O
ASP.NET	B-Application
,	O
the	O
technology	O
used	O
to	O
generate	O
web	O
pages	O
;	O
thus	O
,	O
JScript	B-Language
.NET	I-Language
takes	O
a	O
similar	O
role	O
to	O
PHP	B-Application
and	O
other	O
server-side	O
scripting	B-Language
languages	I-Language
.	O
</s>
<s>
Internet	O
Explorer	O
,	O
however	O
,	O
is	O
still	O
using	O
only	O
the	O
older	O
JScript	B-Language
engine	O
,	O
so	O
JScript.NET	B-Language
cannot	O
be	O
used	O
to	O
script	B-Language
web	O
pages	O
(	O
or	O
HTAs	B-Application
or	O
HTCs	O
)	O
.	O
</s>
<s>
In	O
this	O
regard	O
,	O
JScript	B-Language
is	O
much	O
more	O
versatile	O
than	O
JScript	B-Language
.NET	I-Language
.	O
</s>
