title: what's wrong with my jquery multiple selector?
body: <p>I want to select a dynamical element which is num1 first, then find its ul (id=myUl) </p>
  
  <pre><code>&lt;div id="num1"&gt;&lt;/div&gt; // dynamic
  &lt;ul id="myUl"&gt;
  </code></pre>
  
  <p>so I found its id (let's set it to currentNum) and had been converted into the integer, but my expression did not work :</p>
  
  <pre><code>$("div#num" + currentNum + "myUl")
  </code></pre>
  
  <p>I think the semicolon is wrong placed</p>