using - if( isNaN( ) ) ) to find an replace
<p>I've got a little calculator that I want to configure CSS Margin Shorthand to %</p>

<p>I'm currently getting the user to input the numbers in a form on which I then seperate each number and 'do the maths' to it.</p>

<p>I want it to ignore any NaN when the user uses CSS shorthand.</p>

<p>I've currently got this -</p>

<pre><code>  if( isNaN( parseInt(margins || paddings ) ) )
       alert(" Please re-enter your age.");
</code></pre>

<p>which works but I want to change the "alert" bit to just ignore/replace the NaN with nothing.</p>

<p>Any ideas?</p>

<p>here's a link to my JSFiddle - <a href="http://jsfiddle.net/sturobson/reCjA/8/" rel="nofollow">http://jsfiddle.net/sturobson/reCjA/8/</a></p>

<p>I don't want the NaN's to appear if the user hasn't submitted any numbers</p>
