[FX.php List] Problem with Javascript validating Checkboxes

[Andrew Denman]

The code won't work because to the javascript, 'en_trial_yes[]' is the name
of the checkboxes.  Only PHP recognizes the [] in the name and creates an
array from the form.  The problem is you cannot use [] in javascript without
escaping it, so this is the only way I've found to get to the checkboxes:

 

1. Place the form in a variable ('frm' below)

2. Reference the checkboxes with this: frm['en_trial_yes[]']

3. You can then use this name just like you would any other variable

 

<!-- Code -->

var frm = document.newConsult;

var IsEnteralReason = "";

 

  for (var i = 0; i < frm['en_trial_yes[]'].length; i++) {

  if (frm['en_trial_yes[]'][i].checked) {

  IsEnteralReason = frm['en_trial_yes[]'][i].value;

  }

      }

      

 if (IsEnteralReason == "") {

 

 alert ("Please indicate the reason(s) the enteral trial was
unsuccessful!");

 return false;

 }

<!-- End Code -->

 

I had a revelation while typing this. I haven't tested it yet, but this
might/should work:

1. Put the checkboxes in a variable (ie: var en_trial =
document.newConsult['en_trial_yes[]'];)

2. And then use en_trial as the checkbox name in javascript (ie;
IsEnteralReason = en_trial[i].value;). 

If you try this, let us know how it turns out.

 

Andrew Denman



  _____  

From: fx.php_list-bounces at mail.iviking.org
[mailto:fx.php_list-bounces at mail.iviking.org] On Behalf Of Kim Hawksworth
Sent: Friday, July 28, 2006 7:55 AM
To: fx.php_list at mail.iviking.org
Subject: [FX.php List] Problem with Javascript validating Checkboxes

 

I'm trying to use Javascript to validate that at least one checkbox from a
checkbox field has been selected.  The checkboxes are being pulled from a
value list in FM8.  The php code that displays the checkboxes on the form
looks like this:

<?php
foreach ($getList ['valueLists']['en_trial_yes_list'] as $key => $value) {
?>
<input type="checkbox" name="en_trial_yes[]" value="<?php echo $value; ?>">
<?php echo $value; ?><br />
<?php
}

The Javascript code I'm using to validate the checkboxes looks like this:

 var IsEnteralReason = ""
 
  for (var i = 0; i < document.newConsult.en_trial_yes.length; i++) {
  if (document.newConsult.en_trial_yes[i].checked) {
  IsEnteralReason = document.newConsult.en_trial_yes[i].value
  }
      }
      
 if (IsEnteralReason == "") {

 alert ("Please indicate the reason(s) the enteral trial was
unsuccessful!");
 return false;
 }

For the life of me I can't get the Javascript to validate this field.  Any
ideas what I'm doing wrong?

Thanks for your help.

-- 
Kim D. Hawksworth, R.Ph., Web Manager
The Ohio State University Health System
Department of Pharmacy
(614) 293-3765
kim.hawksworth at osumc.edu



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