title: Use css selector to select all div elements with some class, but without style attribute
body: <p>I'm writing a crawler with <a href="https://github.com/felipecsl/wombat/" rel="nofollow">wombat</a>. And somehow i'm using CSS selectors, not XPATH. And i have very difficult selection here - that i can't achieve using css.</p>
  
  <p>I have div elements that i want to grab from a page:</p>
  
  <pre><code>&lt;div class="do_cat_ads_box"&gt; ... &lt;/div&gt;
  &lt;div class="do_cat_ads_box2"&gt; ... &lt;/div&gt;
  &lt;div class="do_cat_ads_box" style=".."&gt; ...&lt;/div&gt;
  &lt;div class="do_cat_ads_box2" style=".."&gt; ... &lt;/div&gt;
  </code></pre>
  
  <p>But elements with 'style' attribute - are garbage (ads) that i don't need.</p>
  
  <p>So my question is, can I grab all div elements with classes 'do_cat_ads_box' and 'do_cat_ads_box2', but avoid div elements that have 'style' attribute?</p>
  
  <p>I ended up with something like this and it is not working:</p>
  
  <pre><code>application 'css=div.do_cat_ads_box2, div.do_cat_ads_box,  div.do_cat_ads_box:not(@style)', :iterator do
    href 'css=div.do_cat_ads_image  a @href'
    name 'css=div.do_cat_ads_detail a'
  end
  </code></pre>
  
  <p>if it's not double with css selectors, then there is always xpath way. But i'm very interested in css-selectors approach.</p>