title: jQuery moving MultiSelect values to another MultiSelect
body: <p>So I have a MultiSelect box with x values which I need the ability to move to another MultiSelect box and vise versa.</p>
  
  <pre><code>&lt;select class="boxa" multiple="multiple"&gt;
    &lt;option value="volvo"&gt;Volvo&lt;/option&gt;
    &lt;option value="saab"&gt;Saab&lt;/option&gt;
    &lt;option value="mercedes"&gt;Mercedes&lt;/option&gt;
    &lt;option value="audi"&gt;Audi&lt;/option&gt;
  &lt;/select&gt;
  
  &lt;select class="boxb" multiple="multiple"&gt;
  
  &lt;/select&gt;
  </code></pre>
  
  <p>Need to move all or one of the values of boxa to boxb on a button click, also with the ability to move the values back from boxb to boxa.</p>
  
  <p>Does jQuery have anything like this or is this a custom snippet of code?</p>