title: What's this UI pattern called?
body: <p>I'm trying to figure out what this sort of thing is called, and eventually how I can create one in a web browser. It looks like this (screenshot of the first app that came to mind):</p>
  
  <p><img src="https://i.stack.imgur.com/bCuFJ.png" alt="enter image description here"></p>
  
  <p>The specific component/pattern I'm looking for is the two <a href="http://en.wikipedia.org/wiki/List_box" rel="noreferrer">list boxes</a> ("Included Gear" and "Excluded Gear") that represent inclusion/exclusion of items from a set. I'm not really looking for the WPF name (if there is one) but it might be helpful.</p>
  
  <p>I <em>am</em> looking for the name of this thingy, if there is one, and if you really want to make my day, you can point me toward a jQuery or YUI way of making one of these dealies in a browser.</p>