Form Validation - What am I missing?

[ilalonde]

Hi,

I've got a form validation function that checks to make sure a form value is 19 characters long:

<SCRIPT LANGAUGE="JavaScript">
function checkrequired(){
if (document.data.card_number.value.length > 19 ||document.data.card_number.value.length < 19)
{
alert("Card Number Must be 19 Characters")
return false
}
}
</script>

Call it using:
<FORM NAME="data" METHOD=POST ACTION="myscript.asp" onSubmit="checkrequired(this)">

The alert box pops up if anything other than 19 characters is entered, you hit OK on the alert box, but you're still taken to myscript.asp?

What am I missing?

Thanks

[beetle]

onSubmit="return checkrequired(this)"

You also don't need the double-condition

if ( document.data.card_number.value.length != 19 )

[ilalonde]

onSubmit="return checkrequired(this)"

You also don't need the double-condition

if ( document.data.card_number.value.length != 19 )

I was SURE I tried that...

Apparently not.

Thanks