jQuery Validation, Numeric Value Only
<p>I'm trying to validate a form input value. The function below states is the value of the input is a number below 150, show error. Works as it should. However, I want to add to it. If the value contains ANYTHING other than a numeric value AND/OR is a value under 150, show error...</p>

<p>How can I modify?</p>

<pre><code>if ($('.billboard-height').val() &lt; 150) {
    $('.sb-billboardalert').fadeIn(600);
}
</code></pre>
