Bootstrap modals (from w3Schools)

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container">
  <h2>Modal Options</h2>
  <p>The data-backdrop attribute specifies whether the modal should have a dark overlay (the background color of the current page) or not.</p>
  <!-- Trigger the modal with a button -->
  <button type="button" class="btn btn-info btn-md" data-toggle="modal" data-target="#myModal" data-backdrop="true">Modal with Overlay (true)</button>
  <button type="button" class="btn btn-info btn-md" data-toggle="modal" data-target="#myModal2" data-backdrop="false">Modal without Overlay (false)</button>
  <button type="button" class="btn btn-info btn-md" data-toggle="modal" data-target="#myModal3" data-backdrop="static">Modal with static backdrop</button>

  <!-- Modal -->
  <div class="modal fade" id="myModal" role="dialog">
    <div class="modal-dialog">
    
      <!-- Modal content-->
      <div class="modal-content">
        <div class="modal-header">
         
          <h4 class="modal-title">Modal with Dark Overlay</h4>
        </div>
        <div class="modal-body">
         <button type="button" class="close" data-dismiss="modal">&times;</button>
          <p>This modal has a dark overlay.</p>
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        </div>
      </div>
      
    </div>
  </div>
  
  <!-- Modal -->
  <div class="modal fade" id="myModal2" role="dialog">
    <div class="modal-dialog">
    
      <!-- Modal content-->
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal">в</button>
          <h4 class="modal-title">Modal without Overlay</h4>
        </div>
 ...