<s>
Crawljax	B-Application
is	O
a	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
web	B-Application
crawler	I-Application
for	O
automatically	O
crawling	O
and	O
analyzing	O
dynamic	O
Ajax-based	B-General_Concept
Web	O
applications	O
.	O
</s>
<s>
One	O
major	O
point	O
of	O
difference	O
between	O
Crawljax	B-Application
and	O
other	O
traditional	O
web	B-Application
crawlers	I-Application
is	O
that	O
Crawljax	B-Application
is	O
an	O
event-driven	O
dynamic	O
crawler	O
,	O
capable	O
of	O
exploring	O
JavaScript-based	O
DOM	O
state	O
changes	O
.	O
</s>
<s>
Crawljax	B-Application
can	O
be	O
used	O
to	O
crawl	O
and	O
create	O
a	O
static	O
mirror	O
of	O
any	O
Ajax	B-General_Concept
web	O
application	O
.	O
</s>
