Jquery If value is NaN
<p>I am having some trouble with an if statement. I want to set num to 0 of NaN:</p>

<pre><code>$('input').keyup(function() {

var tal = $(this).val();
var num = $(this).data('boks');
if(isNaN(tal)) {
var tal = 0;
}
});
</code></pre>
