title: Jquery is(":visible") on a class
body: <p>At the moment I am doing this:</p>
  
  <pre><code>bl = !$("#divModal1").is(":visible") &amp;&amp;
      !$("#divModal2").is(":visible") &amp;&amp;
      !$("#divModal3").is(":visible") &amp;&amp;
      !$("#divModal4").is(":visible") &amp;&amp;
      !$("#divModal5").is(":visible");
  </code></pre>
  
  <p>where divModal# are all divs who share the same class class="divModalDialog".</p>
  
  <p>Is there a better way of doing this by checking the class rather than each individual one?</p>
  
  <p>Basically bl must be false if one or more of these divModal# is showing.</p>