Java EE (Java Enterprise Edition) General Discussion

Is there a way to open a new window (pop-up) in JSP (not using Javascript:window.open()).

I basically have a JSP that checks user enter data. The If user enter incorrect data it will redirect to itself with a http session value (f-failed) to indicate the type of data error and display proper error message.
If user enter all correct data then it will display a new window (pop-up) in front of the previous window. All also passing values to the new window!

Whats the window.open() in JSP?

THanks