How to do Null value check in Java script?
<p>in jsp i am writing java script. Please help me how to do null check in javascript? i have drop down list. onchange some action should happen. pleae find below code. </p>

<pre><code>&lt;select onchange="openPage(this.value)"&gt;
</code></pre>

<p>here some times this.value can be null. simply i need to do null check.when it is not null then only it should call openPage() method. please help me how to solve?</p>

<p>Thanks!</p>
