Accessing form field on a page with JSP code on the SAME page

Hello people,
This is what i want to do...
I need a profile form for my project wherein the user can update his profile.
it has a username field. I want the username to be changeable at any point of time.
if the user wishes to change his username he simply goes to the Change_Profile page (the one im talking about) and changes it.
But the username should not conflict with the username that any other member might have already chosen
so i put a button on the form right below the field "username" for the user to check for the username's availability.
I want the following things to happen when the user types a username and clicks on this button (which is not a submit button)
1. I want to access my MS SQL 2000 server database and check for all usernames accepted by that form
2. I want to compare each with this username
3. I want to show the result to the user on the very same page+*. that is "Username available" or "Username Taken"
4. I want to show the result using an alert message from javascript+*
help me if u can please.

1. Don't do SELECT * FROM users for fun unless you want to list them all to the client.
2. Use a WHERE clause in your query and just check if it returns zero rows or not.
3. Let the servlet with the business logic forward the request to the same page using RequestDispatcher.
4. Let the JSP print the Javascript code to the response based on a condition.

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http://forums.adobe.com/thread/1160899
7.George Johnson,
28-Feb-2013 09:42 in reply to natelfo
Is this what you mean?
Also see:
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Message was edited by: Chacapamac

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Message was edited by:
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Accessing form field on a page with JSP code on the SAME page

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