Posted by Benjamin Niemann on 07/07/20 11:23

Safalra wrote:

> Roy Schestowitz wrote:
>> ppcguy wrote:
>> > i've got a login page with name and password and
>> > would like the form to be submitted with the
>> > user presses on either of the two input fields.
>> > it works if i do this
>> > <INPUT TYPE="Submit" NAME="Submit" VALUE="Login">
>> > but does not for this:
>> > <INPUT TYPE="Button" NAME="Submit" VALUE="Login"
>> > onclick="onSaveClicked(this)">
>>
>> Why would you ever want to use the latter if the former works? The
>> simpler form gives you the correct behaviour by default...
>
> I presume the the original poster wants to do something with Javascript
> before submitting the form. If this is input validation (the most
> common use of Javascript in forms), it's a really bad idea: never rely
> on client-side validation - always perform it on the server side for
> security.

Sure, but this does not imply that (unobstrusive) client-side validation
must not be done. If it degrades well on non-JS user-agent it can provide a
better usability for the website, saving the user from extra server
roundtrips. But you'll have to implement the validation twice (client-side
JavaScript, server-side whatever) and keep these implementations in sync.

What the OP should do, to do form validation:

<INPUT TYPE="Submit" NAME="Submit" VALUE="Login" onclick="return
validateForm()">

where validateForm() returns 'false', if validation failed.

--
Benjamin Niemann
Email: pink at odahoda dot de
WWW: http://www.odahoda.de/

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