metamaps--metamaps/app/views/metacodes/index.html.erb

<div class='blackBox'>
<%= render :partial => 'admin/adminpanel' %>
<br />
<table>
  <tr>
    <th>Name</th>
    <th>Icon</th>
    <th></th>
    <th></th>
  </tr>

<% @metacodes.each do |metacode| %>
  <tr>
    <td><%= metacode.name %></td>
    <td class="iconURL"><%= metacode.icon %></td>
    <td><img width='40' src='<%= metacode.icon %>' /></td>
    <td><%= link_to 'Edit', edit_metacode_path(metacode) %></td>
  </tr>
<% end %>
</table>
</div>

<script>
$(document).ready(function() {
  $('.blackBox').height( (parseInt($('body').height()) - 40) ).mCustomScrollbar({ 
      mouseWheelPixels: 200,
      advanced: { updateOnContentResize: true }
  });
});
</script>