construccion calendario

var d = new Date();
var day = d.getDate(),
    month = d.getMonth() + 1,
    year = d.getFullYear(),
    days_number = daysInMonth(month, year),
    actual_d = d.getDate(),
    actual_m = d.getMonth() + 1,
    actual_y = d.getFullYear();
function firstDay(month, year) {
        return new Date(year, (month - 1), 1).getDay(); // Sunday is 0, Monday is 1...
    }

    $("span#mes").text(m_text[month]);
    $("span#anio").text(year);

    var diap = 1;
    firstDay = firstDay(m, y);
    
    for (i = 1; i <= 7; i++) {
        if (firstDay === 0) {
            firstDay = 7;
        }
        if (i < firstDay) {
            tbody.append("<td><span></span></td>");
        }
        else {
            tbody.append("<td id=\"" + y + "-" + m + "-" + diap + "\"><span><a href=\"#myModal\" role=\"button\" class=\"days\" data-toggle=\"modal\">" + diap + "</a></span></td>");
            diap++;
        }
    }

    tbody.wrapInner("<tr>");

    for (i = 1; i <= days_number; i++) {
        if (y === actual_y && m === actual_m && diap === actual_d) {
            tbody.append("<td id=\"" + y + "-" + m + "-" + diap + "\" class=\"actual\"><span><a href=\"#myModal\" role=\"button\" class=\"days\" data-toggle=\"modal\">" + diap + "</a></span></td>");
        }
        else {
            tbody.append("<td id=\"" + y + "-" + m + "-" + diap + "\"><span><a href=\"#myModal\" role=\"button\" class=\"days\" data-toggle=\"modal\">" + diap + "</a></span></td>");
        }

        if (i % 7 === 0) { tbody.append("</tr><tr>"); }

        if (diap === days_number) { break; }

        diap++;
    }