jQuery - iterate through all elements with class and change their style
<p>I know this is supposed to be simple, but I'm running into multiple problems. First of all, I don't know how to get all elements of a class and change their display. I found the <code>.each</code> method with this sample code:</p>

<pre><code>$('.classname').each(function(index) {
        alert(index);
});
</code></pre>

<p>What do I need instead of the alert to change the display property of an element from 'none' to block'?</p>

<p>The second problem is, the class name is gathered from a hidden field. Let's name this variable <code>service</code>. When I try to replace the '.classname' with '.'+service I get an error saying 'Syntax error, unrecognized expression: .'.</p>

<p>So the actual code would be something like:</p>

<pre><code>var service=$('#service').val();
$('.'+service).each(function(index) {
        alert(index);
});
</code></pre>

<p>I'm sure this can't be complicated but I can't figure it out.</p>

<p>Any alternative solution is of course welcome.</p>
