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simple IF statement deriving values from jQuery driving me mad!

in Using jQuery • 11 years ago

Hi all,

I'm running some very simple validation using javascript and an alert message to make sure there is a value in two fields, if not then pop-up a simple alert telling the user. This should be really easy but will only work for some reason with one variable (firstname) and not two variables (lastname).

function ajaxNext2(){
var product = jQuery("select[name='product']").val();
var quantity = jQuery("input[name='quantity']").val();
var print_front = jQuery("select[name='print_front']").val();
var print_back = jQuery("select[name='print_back']").val();
var embroidery = jQuery("select[name='embroidery']").val();
var embroided_names = jQuery("select[name='embroided_names']").val();
var printed_names = jQuery("select[name='printed_names']").val();
var firstname = jQuery("input[name='firstname']").val();
var lastname = jQuery("input[name='lastname']").val();
var email = jQuery("input[name='email']").val();
var phone = jQuery("input[name='phone']").val();
var uni = jQuery("input[name='uni']").val();
var reqby = jQuery("input[name='reqby']").val();
var message = jQuery("textarea[name='message']").val();
var unit_price = jQuery("input[name='unit_price']").val();
var total_price = jQuery("input[name='total_price']").val();
if (firstname!=null && lastname!=null) {
alert('Please complete required fields');
} else {
alert('Proceed');
}
}

Would be extremely grateful for some help. Have no idea why this does not work?

The code is located in a javascript file.

Many thanks

Replies(5)

jay.blanc..

Re: simple IF statement deriving values from jQuery driving me mad!

11 years ago

Your test checks to see if both are null before giving an alert, you need to change to an OR statement and equal statements (read out loud this would say "if firstname is null or if lastname is null:

if(firstname == null || lastname == null)

rminde

Re: simple IF statement deriving values from jQuery driving me mad!

11 years ago

try this

if (firstname=="" || lastname=="") {
alert('Please complete required fields');
} else {
alert('Proceed');
}

jainsy

Re: simple IF statement deriving values from jQuery driving me mad!

11 years ago

This is strange. It is saying Proceed even if both firstname and lastname are complete or incomplete, it is so strange. There are no characters in either of the fields. Very weird.