What's the equivalent of PHP's " .= " in Javascript, to add something to a variable..?
<p>In PHP you can do:</p>

<pre><code>$myvar = "Hello";
$myvar .= " world!";
echo $myvar;
</code></pre>

<p>The output is: Hello world!</p>

<p>How can I do this in Javascript/jQuery..?</p>
