title: jQuery Selector Question
body: <p>i am actually doing a accordion/sliding menu. here, i want to slide up sibling li > ul that has been open (or displayed). can i simplify this further? </p>
  
  <pre><code>$(this).parent("li").siblings("li:has(ul)").children("ul").slideUp("fast");
  </code></pre>
  
  <p>i also noticed that i cannot skip the children() part and do something like </p>
  
  <pre><code>$(this).parent("li").siblings("li:has(ul) ul").slideUp("fast");
  </code></pre>
  
  <p>why is siblings("li:has(ul) ul") different from siblings("li:has(ul)").children("ul")?</p>