Trying to use Jquery/javascript to calculate form fields

Question

Im having a terrible time trying to calculate the value of two form fields. I'm constantly getting "NAN" which would indicate non-numeric input, this is despite the fact that the form fields are only populated with numbers.

In response I tried to use ParseInt to get a numeric value. This also fails to yield a successful result.

This is what I have so far. Any help is appreciated.

$('#value-calc input').change(function () {

    var valueINT = parseInt($('#value'),10);
    var quantINT = parseInt($('#quantity'), 10);
    var math = ((valueINT/quantINT)*1000);

    $('#cpm').val(math);
});

http://jsfiddle.net/greyoxide/YRWAA/1/

tbwiii · Accepted Answer · 2013-02-12 18:43:18Z

1

You need to add the .val() method after your selectors to get the value they hold

working fiddle

answered Feb 12, 2013 at 18:43

tbwiii

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BLSully · Accepted Answer · 2013-02-12 18:51:50Z

1

You're not passing in strings when you refer to elements by ID with that jQuery.

Perhaps try $('#value').val() in the parseInt methods instead.

edited Feb 12, 2013 at 18:51

BLSully

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answered Feb 12, 2013 at 18:44

Antiga

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1 Comment

greyoxide Over a year ago

Thanks I didnt understand that I needed to qualify the input.

Aleksandar · Accepted Answer · 2013-02-12 19:10:44Z

0

Try this:

$('#value-calc input').keyup(function () {

var valueINT = $('#value').val();
var quantINT = $('#quantity').val();
var math = ((valueINT/quantINT)*1000);
$('#cpm').val(math);

});

answered Feb 12, 2013 at 19:10

Aleksandar

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