unload event handling

hello all:
I'm having a problem, I'm opening an asp web page using javascript window.open method. The thing is, in the window opened I need to prevent that the user close the window without typing any information required. I mean, I know that I have to check if the user type something in fields in the UNLOAD event of the body tag, but how can I stop the window from closing if the checks are false?
I hope someone can help me.
thanks in advance.

Comments

  • The only possible way would be to use return false, but if that works there's a big problem with the browser. Imagine how easy it would be to have a page which doesn't let you leave. Besides, you can never rely on a Javascript being run. You'll need some server-side checks to see if the form is empty, instead.
    ^D
    $ shameless-plug
    http://line-ed.sourceforge.net

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