create modal screen on the center of the page to display data in a sub <div>

<div id="data_modal" class="modal fade">  
      <div class="modal-dialog">  
           <div class="modal-content">  
                <div class="modal-header">  
                     <button type="button" class="close" data-dismiss="modal">&times;</button>  
                     <h4 class="modal-title">Employee Details</h4>  
                </div>  
                <div class="modal-body" id="employee_detail">  
                </div>  
                <div class="modal-footer">  
                     <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>  
                </div>  
           </div>  
      </div>  
 </div>