modify bootstrap.css Of this document .modal-backdrop

Will the original
.modal-backdrop { position: fixed; top: 0; right: 0; bottom: 0; left: 0;
z-index: 1040; background-color: #000; }
  Change to
.modal-backdrop { opacity: 0 !important; filter: alpha(opacity=0) !important; }
  in addition , Closing style of pop-up box :

set up data-backdrop="true"   When you click on the background , Pop up window closed  
set up data-backdrop="static" When you click on the background , Popup No close  
set up data-backdrop="false"  There is no background , And pop up when you click on the background No close  

example :  <div id="grantAuthorityModal" class="modal inmodal fade" tabindex="-1"
                    role="dialog" aria-hidden="true" data-backdrop="true" >


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