ventana emergente bootstrap
<div class="modal fade" id="miModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
<h4 class="modal-title" id="myModalLabel">Esto es un modal</h4>
</div>
<div class="modal-body">
Texto del modal
</div>
</div>
</div>
</div>