title: Multiply jquery selectors with variables
body: <p>Jquery allows multiply selectors like this: </p>
  
  <pre><code>$(document).on('change', '#popfrom, #poptill', function()
  </code></pre>
  
  <p>But my selectors come out of a variable like this:</p>
  
  <pre><code>$(document).on('change', adddatedropper, function()
  </code></pre>
  
  <p>Can someone please tell me how to add a second selector out of a variable? Do I need to make a single string out of both variables or is there another way?</p>