Checkbox checked, disabled it

[Xochitl5E06]

Please, will you help me?

I need disable a checkbox with javascript after it has been selected, I did the next :

I selected a rows from Postgres DB for create the checkbox. I use a Perl languaje in Linux Centos 7, the code is next:

while(my $ref_alarm = $sth->fetchrow_hashref()) {

        ($gabinete)=$ref_alarm->{'gabinete'};

        ($alarma)=$ref_alarm->{'descrip_alarma'};

        print "<input type='checkbox' name='alarma' id='alarma' value='$alarma' onclick='alarma_reg(this.value);'/>$alarma</input>";

        print "<br>";

}

I had been use javascript for disable the checkbox that had been selected:

function alarma_reg(p_alarma) {

                //Get the checkbox

                document.getElementById("p_alarma").disabled = true;

                alarma_operada+=p_alarma + ',';

                document.getElementById("ver_alarmas").value=alarma_operada;

        }

But the option selected is not disable, please could you help me?

Regards

Xochitl

[Asim123]

You want it to be 'readonly' if it's checked?

How do you check it, manually or with a code from somewhere else?

Do you have condition to uncheck it?

[Xochitl5E06]

You want it to be 'readonly' if it's checked?

Yes, when the user check the checkbox it's state must to change to disable o readonly.

How do you check it, manually or with a code from somewhere else?

I checked manually

Do you have condition to uncheck it?

The condition is, when it's selected  then change the checkbox state to disable.  So, the user will can't select anymore.

[Bernd Alheit]

Does you use a HTML form?

[Xochitl5E06]

Yes.  I had been use a HTML FORM.

[Bernd Alheit]

You are posting in a wrong forum.

[JR Boulay]

Your script is not a regular PDF-JavaScript.

Place this script in the checkbox as a MouseUp action:

if (event.target.value) != "Off") {event.target.readonly = true;}

[Xochitl5E06]

Thanks for answered but sorry I don't what is a PDF-JavaScript.

Sorry.

Regards