Script to warn if all text fields are empty on a form? : Javascript

Hello,

I need to write a piece of Javascript to determine if *all* text
fields on a form are empty.

I know how to do this when each text field has a fixed name. Problem
is, each one has a dynamically assigned name.

I simply need to check if *all* boxes are empty. There is usually
10-20 boxes on my form and I want the user to be able to submit the
form if they enter values into at least one text field, but not if
they enter nothing.

How do I do this?

Thanks,
Lee

wrote on 02 jul 2003 in comp.lang.java.javascript:

> Hello,
>
> I need to write a piece of Javascript to determine if *all* text
> fields on a form are empty.
>
> I know how to do this when each text field has a fixed name. Problem
> is, each one has a dynamically assigned name.
>
> I simply need to check if *all* boxes are empty. There is usually
> 10-20 boxes on my form and I want the user to be able to submit the
> form if they enter values into at least one text field, but not if
> they enter nothing.

l=(""+
document.myForm.myField1.value+
document.myForm.myField2.value+
document.myForm.myField3.value+
document.myForm.myField4.value+
document.myForm.myField5.value)

if(l.length>0)
{alert("Not all empty")}
else
{alert("All empty")}

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

On 02 Jul 2003 14:45:29 GMT, "Evertjan."
<exjxw.hannivoort@interxnl.net> wrote:

>l=(""+
>document.myForm.myField1.value+
>document.myForm.myField2.value+
>document.myForm.myField3.value+
>document.myForm.myField4.value+
>document.myForm.myField5.value)
>
>if(l.length>0)
> {alert("Not all empty")}
>else
> {alert("All empty")}

That won't work because the number of the next boxes is dynamic. There
could be 5, there could be 50. I said there is usually 10-20 but this
changes.

Any ideas?

wrote on 02 jul 2003 in comp.lang.java.javascript:

> On 02 Jul 2003 14:45:29 GMT, "Evertjan."
> <exjxw.hannivoort@interxnl.net> wrote:
>
>>l=(""+
>>document.myForm.myField1.value+
>>document.myForm.myField2.value+
>>document.myForm.myField3.value+
>>document.myForm.myField4.value+
>>document.myForm.myField5.value)
>>
>>if(l.length>0)
>> {alert("Not all empty")}
>>else
>> {alert("All empty")}
>
> That won't work because the number of the next boxes is dynamic. There
> could be 5, there could be 50. I said there is usually 10-20 but this
> changes.

Yes it would work, because I did not intend to give you a finished
programme, but to show you that making one long string and testing it for
a length > 0

If you make the number of inputs dynamic, there is no reason not to make
the javascript dynamic too.

To help you on your way:


l=""
for(i=1;i<imax;i++)
l+=document.myForm['myField'+i].value

or perhaps something like:

l=""
for(i in document.myForm.myFields)
l+=document.myForm.myFields[i].value

or counting on another level

n=0
for(i in document.myForm.myFields)
n+=document.myForm.myFields[i].value.length


not tested, you have to work on it.


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