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how to keep the values of radio buttons intact?

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i have a html form with radio buttons. WHen I click submit, i use the req paramter to create arraylist and process the values. (using struts like action env)
my problem is that when i click save/submit button the values i had clicked on the radio buttons get lost. what should i do to keep them as it is?
I heard about sessions, hidden but they are used to pass values to further pages. I am just looking to keep the radio btn values what i chose before submitting submit.
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If you're using Struts, you can define your ActionForm to be bound to the session instead of the request (default), so when it's loaded later the values will still be there and correctly rendered by Struts when it dishes out the page again for the client.
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Moving to the Frameworks forum.
Don't get me started about those stupid light bulbs.
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