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JavaScript && DB

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Nov 23.2011

Hello,
I want to verify that the data in my form in HTML is already exist in my database if this is true then the form must not be sent.
I know this is done in javascript but I can not found the right solution.
I would like an illustrative example ,please.
Thanks.

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@cbVisionNov 23.2011 — It can't be done with JavaScript alone. You need to use a server side language to interact with the database (ex: PHP).

You can use JavaScript (AJAX) to make a call to the PHP file that checks the database and then prevent the form from being submitted.
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@KorNov 23.2011 — And :

I would like an illustrative example ,please.
[/QUOTE]
http://www.w3schools.com/php/php_ajax_database.asp
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@djowelleauthorNov 23.2011 — Thank you ,this is the example that I want ?
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@djowelleauthorNov 23.2011 — I could not be able to add an php file to my webapplication project.

How can I create a php file with netbeans 7?
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@KorNov 24.2011 — I could not be able to add an php file to my webapplication project.

How can I create a php file with netbeans 7?[/QUOTE]
You may create it even with Notepad... ?. Make sure you save your file as UTF-8 encoded, without BOM.

But:

Are you working on a server? You need a server, like Apache, to be installed and started.
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@djowelleauthorNov 26.2011 — Thank you for your help ?
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