checkbox arrays and validation

["Angelo Zanetti" <binc2@xxxxxxxxxxx>]

Hi all, 

this might be slightly off-topic in a way but Im looking for help not
flaming.

Ok I have a checkbox array that I populate from a DB using php:

while ($row = mysql_fetch_array($result))
      echo("<input type=checkbox name=chkmodels[] value=" .
$row['models_id'] . ">" . $row['models_type'] . "<br>");

So when I want to see each variable in the array I use:

		foreach ($_POST['chkmodels'] as $c)
		{
			echo("<br> value: " . $c);
		}

this is fine. 

but what I want to clarify is that if I change my PHP echo statement
to:

echo("<input type=checkbox name=chkmodels value=" . $row['models_id'] .
">" . $row['models_type'] . "<br>");

basically without the [] then it is still recognised as an array. But
when the array is passed back it is returned as a string separated by
commas. Then I should use the split() function to create an array.
IE:

$modelsArray = split('[,]', $chkmodels);

however when I try the second way (without the [])

like this:

if(isset($_POST['chkmodels']))
	$selModels=$_POST['chkmodels'];	
else
	header("Location: ../freesample.php");



if(isset($selModels))
{

	echo("selmodels: " .$selModels);
	$selModelsInd = split('[,]',$selModels);
	echo("<br>Ind modesl" . $selModelsInd);
	foreach ($selModelsInd as $c)
	{
		echo("<br> value: " . $c);
	}
}


I get the following results, when I select 2 checkboxes:

selmodels: 2
Ind modeslArray
value: 2

this is wrong and should output the following:

selmodels: 2
Ind modeslArray
value: 1
value: 2

as the values of the selected checkboxes are 1 and 2 and also there are
two that are selected.

Here is the OT part. how do I reference the checkboxes in javascript if
the chkmodels[] is used?

I have tried many things like:

myCheckboxArray = document.forms[0].elements["chkmodels[]"];

and 

myCheckboxArray = document.frmft[0].elements["chkmodels[]"]; //where
frmft is the name of my form.

If someone could please advise me as to what I'm doing wrong or why the
information is not being outputted as expected, that would be really
helpful.

thanks in advance
Angelo

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