Getting the equiv 'upper bound' of a form

[Kenneth]

Hello all,

I'm trying to do some form validation on a form that collects its data into
a multidimensiona l array, and on submitting that re-writes the values as
hidden form elements (a form that keeps adding submitted values to a
multidimensiona l array).

However, since the hidden form fields have to be identically named to the
visible form fields, I can't make my JavaScript return an error if the field
is blank because there are already fields in the form that are filled.

Essentially, I need a way to refer to the /last/ field in my form with a
given name, instead of the /first/, to check to see if it is empty.

Thanks,
Ken

[Thomas 'PointedEars' Lahn]

Kenneth wrote:

Essentially, I need a way to refer to the /last/ field in my form with a
given name, instead of the /first/, to check to see if it is empty.

Untested:

function getLastFieldNam ed(oForm, sName)
{
if (oForm
&& oForm.elements
&& sField
&& oForm.elements[sName])
{
var e = oForm.elements[sName];
return (e[0] ? e[e.length - 1] : e);
}

return null;
}

var fld = getLastFieldNam ed(document.for ms["foo"], "bar");
if (fld)
{
// ...
}
HTH

PointedEars

[Vjekoslav Begovic]

"Thomas 'PointedEars' Lahn" <Po*********@we b.de> wrote :

Untested:

function getLastFieldNam ed(oForm, sName)
{
if (oForm
&& oForm.elements
&& sField
What is sField?
&& oForm.elements[sName])
{
var e = oForm.elements[sName];
return (e[0] ? e[e.length - 1] : e);
}

return null;
}

var fld = getLastFieldNam ed(document.for ms["foo"], "bar");
if (fld)
{
// ...
}
HTH

PointedEars

[Thomas 'PointedEars' Lahn]

Vjekoslav Begovic wrote:

"Thomas 'PointedEars' Lahn" <Po*********@we b.de> wrote :

function getLastFieldNam ed(oForm, sName)
{
if (oForm
&& oForm.elements
&& sField

What is sField?

s/Field/Name/g

Sorry, my bad. Changed the argument's identifier and forgot that line.
PointedEars