solved: html is not structurally styled

solved: html is not structurally styled

I get data like this:

$.getJSON("Projektliste.php", function(data) {
                $.each(data, function(key, value) {
                    $("<li><a href='Projekt.html' rel='external' id=" + key + ">" + value.PrName + "</a></li>").appendTo("#Projektlisteneintraege");
                    });
                });

and append it to this listview: <ul data-role='listview' data-theme='g' id="Projektlisteneintraege"></ul>

The resulting page (http://evab.barbalex.ch) shows the data but it is not styled.

Firebug shows no errors.

How can I get jquery to style the listview?

Thanks for help!