Regular Expression for nested html tags

[mohanrajit.88]

Hi Guys,
I'm in need of regular expression for validating the html tags
that are closed properly,

say for example
test content see this ..
it should show an alert "tag is incorrect".
Plz help me....Guys-:)-:)

Thanks in advance

[pritaeas]

I doubt this is possible by only using a regular expression. There are so many levels of nesting possible, I think you would need a parser instead.

[fxm]

It is relatively easy to detect a which is followed by before is encountered, but that may not be an error.

Trivial counter-examples include <b>xxx</b> and <b>xxx</b> and there is an endless supply of not so trivial cases.

It would be possible to test certain tags; beyond that the reply about needing a parser is on point.

[mohanrajit.88]

I doubt this is possible by only using a regular expression. There are so many levels of nesting possible, I think you would need a parser instead.

Pritaeas, you are right,it is possible by regular expression,I found the solution in php way it uses preg_match_all but i'm in need of alternative for it in java script.which should validate ,, tags that are closed properly or not.
Thanks:-/

[fxm]

Javescript RegExp will do _precisely_ what preg_match does.
Neither will solve the general problem, and even the three cases you have now given will not be easy.
Part of the difficulty is that "closed properly" != "closed".