Parsing value to javascript function

Question

I'm trying to figure out why my code is not triggering past a certain point. In the below code the alert for Luhn is displaying fine but it appears to not progress past that. So it appears i am successfully passing the number from the onclick method but the function is not running because i'm not getting a true or false alert based on the rule set.

Any help appreciated

Thanks

<html>

<head>
    <script type="text/javascript">
        function Validate(Luhn) {
            alert(Luhn);
            var LuhnDigit = parseInt(Luhn.substring(Luhn.length - 1, Luhn.length));
            var LuhnLess = Luhn.substring(0, Luhn.length - 1);
            if (Calculate(LuhnLess) == parseInt(LuhnDigit)) {
                alert("True");
                return true;
            }
            alert("False");
            return false;
        }
    </script>
</head>

<body>
    <form>
        <input type="form" id='fv'>
        <input type="button" onclick="Validate('4111111111111111')" value="Call function">

    </form>

</body>

</html>

You know you're not an experienced Javascript programmer when... you name your functions with a capitalized word :) — MaxArt
– MaxArt, Commented Jun 5, 2014 at 7:04

BenMorel · Accepted Answer · 2014-06-27 13:31:19Z

1

The statement after return wont execute and execution control is immediately transferred to calling function. Put alert before return statement. You can read more about return here.

if (Calculate(LuhnLess)==parseInt(LuhnDigit))
{
    alert("True");
    return true;

}   

alert("False");
return false;

edited Jun 27, 2014 at 13:31

BenMorel

37k52 gold badges208 silver badges339 bronze badges

answered Jun 5, 2014 at 7:01

Adil

148k25 gold badges217 silver badges207 bronze badges

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

Collectives™ on Stack Overflow

Parsing value to javascript function

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