jquery block ui for elements

jquery block ui for elements

I am trying to block certain part of the page.I am following the  http://jquery.malsup.com/block/#element tutorial, but i am not able to map the element .

My js:
$('div.repoDisplay').blockUI({ message: '' ,overlayCSS: { backgroundColor: '#fff' }});

My html :
<div class="container-sc" style="display: table;">
  <div id='repoDisplay' >
    <div style="display: table-cell;width:150px">
     \\\\\\\\\\\
      </div>
    </div>
 
   
    <div style="display: table-cell;padding:10px;width:85%"">
      {{outlet}}             
    </div>
  
</div>

Thanks for the help