<datebox></datebox>

    <script type="text/javascript"><![CDATA[

        //var letturaDates = '${dates}'

        var letturaDates= ['09/03/2011', '10/03/2011'];

        //alert(letturaDates);

        //var letturaErrorDates = '${errorDates}'

        //alert(letturaErrorDates);

        var letturaErrorDates= ['10/04/2013', '12/04/2013','14/04/2013','16/04/2013'];

        zk.afterLoad('zul.db', function(){

            zul.db.Renderer.cellHTML = function (cal, y, m, d, monthofs) {

                if(m == -1) {

                    y-= 1;

                    m = 11;

                } else if (m == 12) {

                    y+= 1;

                    m = 0;

                }

                m < 10 ? month = "0" +(m + 1) : month = (m + 1);

                d < 10 ? day = "0" + d : day = d;

                date = day+"/"+month+"/"+ y;

                if(letturaErrorDates.indexOf(date) >= 0) {

                    return '<a href="javascript:onClick(function() { return false; })" style="color: #FFFFFF;text-decoration: none;">' + day + '</a>';

                } else{

                    return '<div style="color: red;">' + day + '</div>';

                }

            };

        }); 

        ]]></script>

</zk>