[jQuery] An easy question: Selecting DOM nodes that doesn't have class "active"

[Giovanni Battista Lenoci]

Hi, I have this code:

<ul>
<li>
  <ul class="menu">
  <li>...</li>
</li>
<li>
  <ul class="menu active">
  <li>...</li>
</li>
<li>
  <ul class="menu">
  <li>...</li>
</li>
</ul>

I want to set css property display:none to all the elements that are
not active.

I'm looking at the doc on ":not" selector, I've tried:

$(':not(.active)').css({'display:none'});

But doesn't works... Where I'm doing wrong?

Thank you