title: Set minimum z-index to jquery datepicker
body: <p>I have case, when my datepicker and some div with buttons overlaps in wrong way.
  For this case I can set manually z-Index to datepicker(for my case z-Index:3 will be fine), but this will broke other places, as z-index is calculated by library (as I know). </p>
  
  <p>So I want to set minimum z-index value to datepicker or just increase z-Index.</p>
  
  <p>So I add to setting object own <code>beforeShow</code> function:</p>
  
  <pre><code>options.beforeShow = function (input,inst ){
      inst.dpDiv.css('z-index', inst.dpDiv.css('z-index') + 2);
  }
  </code></pre>
  
  <p>But this still didn't work.</p>
  
  <p>Full Example: <a href="http://jsfiddle.net/NAgNV/2314/" rel="nofollow noreferrer">http://jsfiddle.net/NAgNV/2314/</a></p>
  
  <hr>
  
  <p>P.S. I can't change z-Index of div with buttons.</p>