How can I test whether a variable has a value in JavaScript?
<p>I want to test whether a JavaScript variable has a value.</p>

<pre><code>var splitarr =  mystring.split( " " );
aparam = splitarr [0]
anotherparam = splitarr [1]
//.... etc
</code></pre>

<p>However the string might not have enough entries so later I want to test it.</p>

<pre><code>if ( anotherparm /* contains a value */ )
</code></pre>

<p>How do I do this?</p>
