A bootstrap 3 snippet for a login modal.

bs3 login modal #snippet

<a data-toggle="modal" href="#myModal" class="btn btn-primary">Launch modal</a>

<div class="modal" id="myModal">
	<div class="modal-dialog">
      <div class="modal-content">
        <div class="modal-header">
          <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
          <h4 class="modal-title">Login</h4>
        </div>
        <div class="modal-body">
<form class="form col-md-12 center-block">
            <div class="form-group">
              <input type="text" class="form-control input-lg" placeholder="Email">
            </div>
            <div class="form-group">
              <input type="password" class="form-control input-lg" placeholder="Password">
            </div>
            <div class="form-group">
              <button class="btn btn-primary btn-lg btn-block">Sign In</button>
              <span class="pull-right"><a href="#">Register</a></span><span><a href="#">Need help?</a></span>
            </div>
          </form>
        </div>
      </div>
    </div>
</div>