Re: [ajug-members]: jsp form question

[Angus Berry <angus.berry@elken.com>]

Jason,

I'm assuming your not using Struts or have requirements for server side
validation, but are relying on client side validation. 

For a fairly clean way to do this in JavaScript, I'd add script to the
<form> tag's onsubmit event that calls a validation function and returns
a boolean true/false something like:

<form onsubmit="return thisFormValidator(this)"....

Your function (thisFormValidator) would return a false if the form isn't
valid and thereby halt the form post. This function could contain simple
per field validations for a short/simple form or loop the collection of
form fields to be validated, picking them with the typeof value for text
inputs, checkboxes etc.

There's a ton of script source sites on the web with more sophisticated
validations for things like correct email format etc... if I dare use
the work sophisticated in the same sentence as JavaScript ;-)



On Fri, 2004-04-02 at 09:01, Jason Kretzer/STAR BASE Consulting Inc.
wrote:
> Good morning all,
> 
> I have a question about form submission.  I have a jsp that has a form
> of about 12 input fields.  All of the fields are required to have
> something in them.  Is there a way to have a javascript to do this and
> then still POST the form to a servlet?
> 
> Thanks,
> 
> -Jason