jQuery calculation gives NaN
<p>Im trying to do a calculation, but i constantly get the error NaN;
Could you help me out how to do the math for var testBottom?</p>

<pre><code>jQuery(document).ready(function(){
var test = jQuery("#test");
var testTopOffset = test.offset();
var testTop = testTopOffset;
var testHeight = test.height();
var testBottom = parseInt(testTop + testHeight);
alert(testHeight);
alert(testBottom);
});
</code></pre>
