Tous les deux mon capitaine !
Voici le code (par exemple):
<!-- Button to trigger modal -->
<p><a href="#newtexmodal" role="button" class="btn btn-info" data-toggle="modal">Un beau bouton</a></p>
<nolink>
<!-- Modal -->
<div id="newtexmodal" class="modal hide" style="z-index: 4050; display: none;" tabindex="-1" role="dialog" aria-labelledby="newtexmodalLabel" aria-hidden="true">
<div class="modal-header"><button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h3 id="newtexmodalLabel">Titre du dialogue modal</h3>
</div>
<div class="modal-body">
<p>Texte du dialogue modal. Lorem ipsum dolor sit amet bla bla bla blu bla blu ...</p></div>
<div class="modal-footer"><button class="btn" data-dismiss="modal" aria-hidden="true">Fermer cette fenêtre</button></div>
</nolink></div>
<!-- End of modal -->Ce qui donne cela :