JavaScript form validation, check if string contains

Question

I have some form validation on my website.

If the account code field contains "XXX" and the reference field is blank, I want an alert to come up for the user to populate the reference field.

I have read that indexOf is the function I need, but the code below does not appear to work. Any ideas?

<SCRIPT>
if (form.account.value.indexOf("XXX") != -1 & form.reference.value == "") { 
   alert("Please Enter Reference Number"); 
   form.reference.focus( ); 
   return false; 
}
</script>

I think you meant &&

j08691
– j08691

2015-11-19 15:59:27 +00:00
Commented Nov 19, 2015 at 15:59 — j08691
– j08691, Commented Nov 19, 2015 at 15:59

Karl Gjertsen · Accepted Answer · 2015-11-19 16:02:31Z

1

Can you try:

if (form.account.value.indexOf("XXX") != -1 && form.reference.value == "") { 
   alert("Please Enter Reference Number"); 
   form.reference.focus( ); 
   return false; 
}

This corrects the AND clause, which uses && not &.

answered Nov 19, 2015 at 16:02

Karl Gjertsen

4,9588 gold badges43 silver badges64 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

JavaScript form validation, check if string contains

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related