title: How to change Date format in `Jquery mask plugin` from dd/mm/yyyy to mm/yy?
body: <p>I am using <code>Jquery Mask Plugin</code> and want to change date format from <code>dd/mm/yyyy</code> (00/00/0000) to  <code>mm/yy</code> (00/00)?? You can check here. I am using this plugin <a href="http://jquery-plugins.net/maskjs-jquery-plugin-to-mask-inputs" rel="nofollow">Jquery Mask Plugin</a> but unable to change format. When i write mm/yyy in place of <code>00/0000</code> it show mm/yyyy in textbox and then i can't modified it.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>$('.expiration').mask("00/0000", {
    placeholder: "__/____"
  });</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;label for="expiration" class="gfield_label"&gt;Expiration (MM/YY)&lt;/label&gt;
  &lt;div class="ginput_complex"&gt;
    &lt;input type="text" class="expiration" id="expiration" name="expiration" tabindex="2" value="" required&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>