onSubmit and Internet Explorer = trouble

[Mark Livingstone]

I have a form that uses the following: onSubmit="some_ var =
'validated';"

FireFox is OK with that. Internet Explorer isn't. any ideas why?

Thanks.

[VK]

Re: onSubmit and Internet Explorer = trouble

On Jun 1, 10:53 am, Mark Livingstone <namematters... @msn.comwrote:

I have a form that uses the following: onSubmit="some_ var =
'validated';"
>
FireFox is OK with that. Internet Explorer isn't. any ideas why?

This code assigns to global variable some_var string value "validated"
and then submits the form so causing new page load with the Javascript
context being reset: so it doesn't matter what value to what do you
assign before that. I don't know what browser and how could be "OK
with that" - you have to explain then what does it mean OK and most
helpful: what are you trying to achieve overall.

[Mark Livingstone]

Re: onSubmit and Internet Explorer = trouble

On Jun 1, 4:23 am, VK <schools_r...@y ahoo.comwrote:

On Jun 1, 10:53 am, Mark Livingstone <namematters... @msn.comwrote:
>

I have a form that uses the following: onSubmit="some_ var =
'validated';"

>

FireFox is OK with that. Internet Explorer isn't. any ideas why?

>
This code assigns to global variable some_var string value "validated"
and then submits the form so causing new page load with the Javascript
context being reset: so it doesn't matter what value to what do you
assign before that. I don't know what browser and how could be "OK
with that" - you have to explain then what does it mean OK and most
helpful: what are you trying to achieve overall.

I am using jQuery Forms script to bind to the submit action. so, when
the onSubmit fires, the script picks it up, runs a certain function
and prevents the form from being submitted using the regular POST
method -- it does that using jQuery's AJAX post method. page doesn't
refresh and JS context is not reset. So, FF is OK with that syntax and
I can recognize the value of some_var but IE doesn't.

[Mark Livingstone]

Re: onSubmit and Internet Explorer = trouble

Forgot to mention... if I create a function that assigns a value to
some_var and then do onSubmit="funct ion();", everything works fine.
It's just that IE doesn't want to recognize onSubmit="some_ var =
'value';" or onSubmit="somev ar = 1;" syntax.

[VK]

Re: onSubmit and Internet Explorer = trouble

On Jun 1, 7:48 pm, Mark Livingstone <namematters... @msn.comwrote:

Forgot to mention... if I create a function that assigns a value to
some_var and then do onSubmit="funct ion();", everything works fine.
It's just that IE doesn't want to recognize onSubmit="some_ var =
'value';" or onSubmit="somev ar = 1;" syntax.

If somewhere after page load you do like
document.forms[0].onsubmit = validate;
then it is not important what do you have in the form intrinsic event
listener because it gets overridden. If you have
<form ... onsubmit="some_ var='value';">
then this listener is being overriden so never called. This is
consistent across browsers including Firefox, so whatever it is "OK
with that" - it is not what you are describing in this thread. If you
need to assign a value and call form validator and prevent form
submission if not validated then you could use something like:
<form ... onsubmit="retur n validate(some_v ar='value')">

[Evertjan.]

Re: onSubmit and Internet Explorer = trouble

VK wrote on 01 jun 2008 in comp.lang.javas cript:

On Jun 1, 10:53 am, Mark Livingstone <namematters... @msn.comwrote:

>I have a form that uses the following: onSubmit="some_ var =
>'validated'; "
>>
>FireFox is OK with that. Internet Explorer isn't. any ideas why?

>
This code assigns to global variable some_var string value "validated"
and then submits the form so causing new page load with the Javascript
context being reset: so it doesn't matter what value to what do you
assign before that.

This is not always true, VK, try this:

<form onSubmit="some_ var = 'validated';" target='_blank' ...

And could be usefully used like this:

=============== =============== ============
<form onSubmit="retur n submitOnlyOnce( )" target='_blank' ...

<script type='text/javascript'>
var submitted = false;
function submitOnlyOnce( ) {
if (submitted) return false;
return submitted = true;
};
</script>
=============== =============== ============


--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

[VK]

Re: onSubmit and Internet Explorer = trouble

On Jun 2, 1:51 am, "Evertjan." <exjxw.hannivo. ..@interxnl.net wrote:

VK wrote on 01 jun 2008 in comp.lang.javas cript:
>

On Jun 1, 10:53 am, Mark Livingstone <namematters... @msn.comwrote:

I have a form that uses the following: onSubmit="some_ var =
'validated';"

>

FireFox is OK with that. Internet Explorer isn't. any ideas why?

>

This code assigns to global variable some_var string value "validated"
and then submits the form so causing new page load with the Javascript
context being reset: so it doesn't matter what value to what do you
assign before that.

>
This is not always true, VK, try this:
>
<form onSubmit="some_ var = 'validated';" target='_blank' ...
>
And could be usefully used like this:
>
=============== =============== ============
<form onSubmit="retur n submitOnlyOnce( )" target='_blank' ...
>
<script type='text/javascript'>
var submitted = false;
function submitOnlyOnce( ) {
if (submitted) return false;
return submitted = true;};
>
</script>
=============== =============== ============

You missed the point: of course the intrinsic event handler can be
most useful. I explained that one cannot have two unrelated blocks in
both DOM interface handler and in intrinsic handler: one will be
ignored, namely the intrinsic one.

Doesn't work:

....
document.forms[0].onsubmit = validate;
....
<form ... onsubmit="some_ var='value';/* will be ignored */">


Workaround 1:

document.forms[0].onsubmit = function() {
some_var='value ';
return validate(this);
}

Workaround 2:

<form ... onsubmit="some_ var='value'; return validate(this); ">

If some_var is indeed some additional "submission allowed" flag then
it could be even:

<form ... onsubmit="retur n some_var : validate(this); ">

There is a number of other options but nothing of what OP was trying
to do: it is simply not supported.

[VK]

Re: onSubmit and Internet Explorer = trouble

On Jun 2, 2:17 am, VK <schools_r...@y ahoo.comwrote:

If some_var is indeed some additional "submission allowed" flag then
it could be even:
>
<form ... onsubmit="retur n some_var : validate(this); ">

A rush of typing, sorry, of course:

<form ... onsubmit="retur n some_var ? true : validate(this); ">
or
<form ... onsubmit="retur n some_var ? false : validate(this); ">

depending on some_var being allowing or blocking flag.

[Thomas 'PointedEars' Lahn]

Re: onSubmit and Internet Explorer = trouble

VK wrote:

On Jun 2, 2:17 am, VK <schools_r...@y ahoo.comwrote:

>If some_var is indeed some additional "submission allowed" flag then
>it could be even:
>>
><form ... onsubmit="retur n some_var : validate(this); ">

>
A rush of typing, sorry, of course:
>
<form ... onsubmit="retur n some_var ? true : validate(this); ">
or
<form ... onsubmit="retur n some_var ? false : validate(this); ">
>
depending on some_var being allowing or blocking flag.

A more reasonable and more efficient approach would be

<form ... onsubmit="retur n !!some_var || validate(this); ">
or
<form ... onsubmit="retur n !some_var && validate(this); ">

or using some_var in a gauntlet within validate().


PointedEars
--
Anyone who slaps a 'this page is best viewed with Browser X' label on
a Web page appears to be yearning for the bad old days, before the Web,
when you had very little chance of reading a document written on another
computer, another word processor, or another network. -- Tim Berners-Lee