urgent: validate multiple textfield

poknam

i use several textfields as following:
<?
$n = 10;
for ($i = 0; $i < $n; $i++) :
?>
<input type="text" class="inputtext" name="Subj[]" value="">
<?
endif;
?>

how can i use javascript to check if users have filled in all the textfields?
do i need to change the textfield name to "Subj[$i]"??

zalath

You can refer to the document elements via an array defined by js. It's document.formname.elements[enter number here] or something along those lines. Try a javaScript manual (or a javascript forum for that matter).

poknam

i've tried two methods but still don't work

e.g. one of my textfield is set to
<input type="text" class="inputtext" name="Subj[1]" value="">

the javascript is written as
if (document.form.item("Subj[]",1).value == "")
alert('Please fill in all \"Subject\" field.');

if (document.form.Subj[1].value == "")
alert('Please fill in all \"Subject\" field.');

but error still occur
anyone can help??