JavaScript Form Validation, Return False

Question

I have a function that triggers a number of other functions:

function formvalidation()
{
    ZeroSite();
    BlankPC();
    BlankSite();
    BlankSeats();
}// End of formvalidation

and a form like so:

<form id="quote" name="quote" method="get" onSubmit='return formvalidation();' action="testing.php">

The problem being, if one of the individule functions returns flase then the form still gets submitted, is there any way of passing the return false to the parent function?

Thanks for looking, B.

Well your formvalidation function doesn't return anything - that's the first thing you need to fix — Gareth
– Gareth, Commented Jun 10, 2011 at 10:22

Mick Hansen · Accepted Answer · 2011-06-10 10:22:15Z

2

Check if all the functions return true, if not return false. Example below

function formvalidation() {
    return (ZeroSite() && BlankPC() && BlankSite() && BlankSeats());
}

answered Jun 10, 2011 at 10:22

Mick Hansen

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1 Comment

Mick Hansen Over a year ago

And you're certain the functions do return false - do you get any javascript errors, errors might prevent the function from being run correctly and not returning false to the onsubmit. Possibly try putting a portion of the JS and HTML on jsfiddle.net

Frode · Accepted Answer · 2011-06-10 18:35:08Z

1

I see 3 people have already been kind enough to give you identical and perfectly good answers :-) However, using bitwise ANDs instead, you can make sure all the functions are called, even though a previous one has returned false.

function formvalidation() {
    return Boolean( ZeroSite() & BlankPC() & BlankSite() & BlankSeats() );
}

answered Jun 10, 2011 at 18:35

Frode

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Comments

James Allardice · Accepted Answer · 2011-06-10 10:23:04Z

0

Try something like:

function formvalidation() {
    return(ZeroSite() && BlankPC() && BlankSite() && BlankSeats());
}

If any of your other functions return false, the return statement will evaluate to false and the main function will also return false.

answered Jun 10, 2011 at 10:23

James Allardice

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Comments

Omer Tuchfeld · Accepted Answer · 2011-06-10 10:23:07Z

0

When all of these functions just return a value you must check for that value...

function formvalidation()
{
    return (ZeroSite() && BlankPC() && BlankSite() && BlankSeats());
}// End of formvalidation

answered Jun 10, 2011 at 10:23

Omer Tuchfeld

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