/* Author: Mihai Bazon, September 2002
 * http://students.infoiasi.ro/~mishoo
 *
 * Version: 0.7
 *
 * Feel free to use this script under the terms of the GNU General Public
 * License, as long as you do not remove or alter this notice.
 */

var _MN = new Array(
        "Enero",
        "Febrero",
        "Marzo",
        "Abril",
        "Mayo",
        "Junio",
        "Julio",
        "Agosto",
        "Septiembre",
        "Octubre",
        "Noviembre",
        "Diciembre"
        );
var _DN = new Array(
        "Domingo",
        "Lunes",
        "Martes",
        "Miercoles",
        "Jueves",
        "Viernes",
        "Sabado",
        "Domingo"
        );

var _etiquetas = new Array(
        "Aņo anterior",
        "Mes anterior",
        "Hoy",
        "Mes siguiente",
        "Aņo siguiente",
        "Seleccione fecha",
        "Arrastre para mover",
        "Mostrar Lunes primero",
        "Mostrar Domingo primero",
        "Cerrar"
        );
var _MD = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

var agt = navigator.userAgent.toLowerCase();
var is_ie = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));

var _C = null;

function isRelated(el, evt) {
    var related = evt.relatedTarget;
    if (!related) {
        var type = evt.type;
        if (type == "mouseover") related = evt.fromElement;
        else if (type == "mouseout") related = evt.toElement;
    }
    while (related) {
        if (related == el) return true;
        related = related.parentNode;
    }
    return false;
}

function getMonthDays(year, month) {
    if (((0 == (year % 4)) && ( (0 != (year % 100)) || (0 == (year % 400)))) && month == 1) return 29;
    else return _MD[month];
}

function removeClass(el, className) {
    if (!(el && el.className)) return;
    var classes = el.className.split(" ");
    var newClasses = new Array;
    for (i = 0; i < classes.length; ++i)
        if (classes[i] != className) newClasses[newClasses.length] = classes[i];
    el.className = newClasses.join(" ");
}

function addClass(el, className) {
    el.className += " " + className;
}

function getElement(ev) {
    if (is_ie) return window.event.srcElement;
    else return ev.currentTarget;
}

function getTargetElement(ev) {
    if (is_ie) return window.event.srcElement;
    else return ev.target;
}

function stopEvent(ev) {
    if (is_ie) {
        window.event.cancelBubble = true;
        window.event.returnValue = false;
    } else {
        ev.preventDefault();
        ev.stopPropagation();
    }
}

function addEvent(el, evname, func) {
    if (is_ie) el.attachEvent("on" + evname, func);
    else el.addEventListener(evname, func, true);
}

function removeEvent(el, evname, func) {
    if (is_ie) el.detachEvent("on" + evname, func);
    else el.removeEventListener(evname, func, true);
}

function findMonth(el) {
    if (typeof el.month != 'undefined') return el;
    else if (typeof el.parentNode.month != 'undefined') return el.parentNode;
    return null;
}

function findYear(el) {
    if (typeof el.year != 'undefined') return el;
    else if (typeof el.parentNode.year != 'undefined') return el.parentNode;
    return null;
}

function tableMouseUp(ev) {
    if (!_C) return;
    var cal = _C;
    if (cal.timeout) clearTimeout(cal.timeout);
    var el = cal.activeDateEl;
    if (!el) return;
    var target = getTargetElement(ev);
    removeClass(el, "active");
    if (target == el || target.parentNode == el) cellClick(el);
    var mon = findMonth(target);
    if (mon) {
        var date = new Date(cal.date);
        if (mon.month != date.getMonth()) {
            date.setMonth(mon.month);
            cal.setDate(date);
        }
    } else {
        var year = findYear(target);
        if (year) {
            var date = new Date(cal.date);
            if (year.year != date.getFullYear()) {
                date.setFullYear(year.year);
                cal.setDate(date);
            }
        }
    }
    removeEvent(document, "mouseup", tableMouseUp);
    removeEvent(document, "mouseover", tableMouseOver);
    removeEvent(document, "mousemove", tableMouseOver);
    el = null;
    _C.hideCombos();
    _C = null;
    stopEvent(ev);
}

function tableMouseOver(ev) {
    if (!_C) return;
    var cal = _C;
    var el = cal.activeDateEl;
    var target = getTargetElement(ev);
    if (target == el || target.parentNode == el) addClass(el, "hilite active");
    else {
        removeClass(el, "active");
        removeClass(el, "hilite");
    }
    var mon = findMonth(target);
    if (mon) {
        var date = new Date(cal.date);
        if (mon.month != date.getMonth()) {
            if (cal.activeMonEl)
                removeClass(cal.activeMonEl, "hilite");
            addClass(mon, "hilite");
            cal.activeMonEl = mon;
        }
    } else {
        var year = findYear(target);
        if (year) {
            var date = new Date(cal.date);
            if (year.year != date.getFullYear()) {
                if (cal.activeYearEl)
                    removeClass(cal.activeYearEl, "hilite");
                addClass(year, "hilite");
                cal.activeYearEl = year;
            }
        }
    }
    stopEvent(ev);
}

function tableMouseDown(ev) {
    if (getTargetElement(ev) == getElement(ev)) stopEvent(ev);
}

function showMonthsCombo() {
    if (!_C) return;
    var cal = _C;
    var cd = cal.activeDateEl;
    var mc = cal.monthsCombo;
    if (cal.activeMonEl)
        removeClass(cal.activeMonEl, "hilite");
    var mon = cal.monthsCombo.getElementsByTagName("div")[cal.date.getMonth()];
    addClass(mon, "hilite");
    cal.activeMonEl = mon;
    mc.style.left = cd.offsetLeft;
    mc.style.top = cd.offsetTop + cd.offsetHeight;
    mc.style.visibility = "visible";
}

function showYearsCombo(fwd) {
    if (!_C) return;
    var cal = _C;
    var cd = cal.activeDateEl;
    var yc = cal.yearsCombo;
    if (cal.activeYearEl)
        removeClass(cal.activeYearEl, "hilite");
    cal.activeYearEl = null;
    var Y = cal.date.getFullYear() + (fwd ? 1 : -1);
    var yr = yc.firstChild;
    var show = false;
    for (var i = 0; i < 12; ++i) {
        if (Y >= cal.minYear && Y <= cal.maxYear) {
            yr.firstChild.data = Y;
            yr.year = Y;
            yr.style.display = "block";
            show = true;
        } else yr.style.display = "none";
        yr = yr.nextSibling;
        Y += fwd ? 2 : -2;
    }
    if (show) {
        yc.style.left = cd.offsetLeft;
        yc.style.top = cd.offsetTop + cd.offsetHeight;
        yc.style.visibility = "visible";
    }
}

function calDragIt(ev) {
    if (!_C.dragging) return;
    var posX;
    var posY;
    if (is_ie) {
        posY = window.event.clientY + document.body.scrollTop;
        posX = window.event.clientX + document.body.scrollLeft;
    } else {
        posX = ev.pageX;
        posY = ev.pageY;
    }
    var st = _C.element.style;
    st.left = (posX - _C.xOffs) + "px";
    st.top = (posY - _C.yOffs) + "px";
    stopEvent(ev);
}

function calDragEnd(ev) {
    _C.dragging = false;
    removeEvent(document, "mousemove", calDragIt);
    removeEvent(document, "mouseup", calDragEnd);
    tableMouseUp(ev);
}

function dayMouseDown(ev) {
    var el = getElement(ev);
    var cal = el.calendar;
    addClass(el, "hilite active");
    cal.activeDateEl = el;
    _C = cal;
    if (el.navtype == 300)
        cal.dragStart(ev);
    else {
        addEvent(document, "mouseover", tableMouseOver);
        addEvent(document, "mousemove", tableMouseOver);
        addEvent(document, "mouseup", tableMouseUp);
    }
    stopEvent(ev);
    if (el.navtype == -1 || el.navtype == 1)
        cal.timeout = setTimeout("showMonthsCombo()", 250);
    else if (el.navtype == -2 || el.navtype == 2)
        cal.timeout = setTimeout((el.navtype > 0) ? "showYearsCombo(true)" : "showYearsCombo(false)", 250);
    else cal.timeout = null;
}

function dayMouseDblClick(ev) {
    cellClick(getElement(ev));
    if (is_ie) {
        document.selection.empty();
    }
}

function dayMouseOver(ev) {
    var el = getElement(ev);
    if (isRelated(el, ev) || _C) return;
    if (el.ttip) el.calendar.tooltips.firstChild.data = el.ttip;
    addClass(el, "hilite");
    stopEvent(ev);
}

function dayMouseOut(ev) {
    var el = getElement(ev);
    if (isRelated(el, ev) || _C) return;
    removeClass(el, "hilite");
    el.calendar.tooltips.firstChild.data = _etiquetas[5];
    stopEvent(ev);
}

function datesEqual(a, b) {
    return a.getFullYear() == b.getFullYear() && a.getMonth() == b.getMonth() && a.getDate() == b.getDate();
}

function cellClick(el) {
    var cal = el.calendar;
    var closing = false;
    var newdate = false;
    if (typeof el.navtype == 'undefined') {
        removeClass(cal.currentDateEl, "today");
        addClass(el, "today");
        closing = cal.currentDateEl == el;
        if (!closing) cal.currentDateEl = el;
        var date = el.caldate;
        cal.date = date;
        newdate = true;
    } else {
        if (el.navtype == 200) {
            cal.callCloseHandler();
            return;
        }
        var date = (el.navtype == 0) ? new Date() : new Date(cal.date);
        var year = date.getFullYear();
        var mon = date.getMonth();
        var setMonth = function (mon) {
            var day = date.getDate();
            var max = getMonthDays(year, mon);
            if (day > max) date.setDate(max);
            date.setMonth(mon);
        }
        switch (el.navtype) {
            case -2:
                if (year > cal.minYear) date.setFullYear(year - 1);
                break;
            case -1:
                if (mon > 0) setMonth(mon - 1);
                else if (year-- > cal.minYear) {
                    date.setFullYear(year);
                    setMonth(11);
                }
                break;
            case 1:
                if (mon < 11) setMonth(mon + 1);
                else if (year < cal.maxYear) {
                    date.setFullYear(year + 1);
                    setMonth(0);
                }
                break;
            case 2:
                if (year < cal.maxYear) date.setFullYear(year + 1);
                break;
            case 100:
                cal.setMondayFirst(!cal.mondayFirst);
                return;
        }
        if (!datesEqual(date, cal.date)) {
            cal.setDate(date);
            newdate = el.navtype == 0;
        } else newdate = closing = el.navtype == 0;
    }
    if (newdate) cal.callHandler();
    if (closing) cal.callCloseHandler();
}

function Calendar(mondayFirst, dateStr, yourHandler, yourCloseHandler) {
    var parent = document.getElementsByTagName("body")[0];
    this.init = function (mondayFirst, date) {
        var year = date.getFullYear();
        if (year < this.minYear) year = this.minYear;
        else if (year > this.maxYear) year = this.maxYear;
        date.setFullYear(year);
        this.mondayFirst = mondayFirst;
        this.date = new Date(date);
        var month = date.getMonth();
        var mday = date.getDate();
        var no_days = getMonthDays(year, month);
        date.setDate(1);
        var wday = date.getDay();
        var MON = mondayFirst ? 1 : 0;
        var SAT = mondayFirst ? 5 : 6;
        var SUN = mondayFirst ? 6 : 0;
        if (mondayFirst) wday = (wday > 0) ? (wday - 1) : 6;
        var iday = 1;
        var row = this.table.getElementsByTagName("tbody")[0].firstChild;
        for (var i = 0; i < 6; ++i,row = row.nextSibling) {
            var cell = row.firstChild;
            if (iday > no_days) {
                row.className = "emptyrow";
                continue;
            }
            else row.className = "daysrow";
            for (var j = 0; j < 7; ++j,cell = cell.nextSibling) {
                if ((!i && j < wday) || iday > no_days)
                    cell.className = "emptycell";
                else {
                    cell.firstChild.data = iday;
                    cell.className = "day";
                    date.setDate(iday);
                    cell.caldate = new Date(date);
                    cell.ttip = _DN[wday + MON].substr(0, 3) + ", " + _MN[month].substr(0, 3) + " " + iday + ", " + year;
                    if (iday == mday) {
                        addClass(cell, "today");
                        this.currentDateEl = cell;
                    }
                    if (wday == SAT || wday == SUN) addClass(cell, "weekend");
                    ++wday;
                    ++iday;
                    if (wday == 7) wday = 0;
                }
            }
        }
        this.title.firstChild.data = _MN[month].substr(0, 3) + ", " + year;
    }
    this.setDate = function (date) {
        if (!datesEqual(date, this.date)) this.init(this.mondayFirst, date);
    }
    this.setMondayFirst = function (mondayFirst) {
        this.init(mondayFirst, this.date);
        this.displayWeekdays();
    }
    this.displayWeekdays = function () {
        var thead = this.table.getElementsByTagName("thead")[0];
        var MON = this.mondayFirst ? 0 : 1;
        var SUN = this.mondayFirst ? 6 : 0;
        var SAT = this.mondayFirst ? 5 : 6;
        var cell = thead.getElementsByTagName("tr")[1].firstChild;
        for (var i = 0; i < 7; ++i,cell = cell.nextSibling) {
            if (!i)
                if (this.mondayFirst) cell.ttip = _etiquetas[8];
                else cell.ttip = _etiquetas[7];
            cell.className = "day name";
            if (i == SUN || i == SAT) addClass(cell, "weekend");
            cell.firstChild.data = _DN[i + 1 - MON].substr(0, 2);
        }
    }
    this.setRange = function (a, z) {
        this.minYear = a;
        this.maxYear = z;
    }
    this.callHandler = function () {
        if (this.yourHandler) this.yourHandler(this, this.formatDate());
    }
    this.callCloseHandler = function () {
        if (this.yourCloseHandler) this.yourCloseHandler(this);
    }
    this.destroy = function () {
        var el = this.element.parentNode;
        el.removeChild(this.element);
    }
    this.show = function () {
        this.element.style.visibility = "visible";
    }
    this.hide = function () {
        this.element.style.visibility = "hidden";
    }
    this.showAt = function (x, y) {
        var s = this.element.style;
        s.left = x + "px";
        s.top = y + "px";
        this.show();
    }
    this.showAtElement = function (el) {
        function Pos(x, y) {
            this.x = x;
            this.y = y;
        }
        function getPos(el) {
            var r = new Pos(el.offsetLeft, el.offsetTop);
            if (el.offsetParent) {
                var tmp = getPos(el.offsetParent);
                r.x += tmp.x;
                r.y += tmp.y;
            }
            return r;
        }
        var p = getPos(el);
        this.showAt(p.x, p.y + el.offsetHeight);
    }
    this.hideCombos = function () {
        this.monthsCombo.style.visibility = "hidden";
        this.yearsCombo.style.visibility = "hidden";
    }
    this.dragStart = function (ev) {
        if (this.dragging) return;
        this.dragging = true;
        var posX;
        var posY;
        if (is_ie) {
            posY = window.event.clientY + document.body.scrollTop;
            posX = window.event.clientX + document.body.scrollLeft;
        } else {
            posY = ev.clientY + window.scrollY;
            posX = ev.clientX + window.scrollX;
        }
        var st = this.element.style;
        this.xOffs = posX - parseInt(st.left);
        this.yOffs = posY - parseInt(st.top);
        addEvent(document, "mousemove", calDragIt);
        addEvent(document, "mouseup", calDragEnd);
    }
    this.setDateFormat = function (str) {
        this.dateFormat = str;
    }
    this.formatDate = function () {
        var str = new String(this.dateFormat);
        var m = this.date.getMonth();
        var d = this.date.getDate();
        var y = this.date.getFullYear();
        var w = this.date.getDay();
        var s = new Array;
        s['d'] = d;
        s['dd'] = (d < 10) ? ('0' + d) : d;
        s['m'] = 1 + m;
        s['mm'] = (m < 9) ? ('0' + (1 + m)) : (1 + m);
        s['y'] = y;
        s['yy'] = new String(y).substr(2, 2);
        s['D'] = _DN[w].substr(0, 3);
        s['DD'] = _DN[w];
        s['M'] = _MN[m].substr(0, 3);
        s['MM'] = _MN[m];
        var re = /(.*)([^a-zA-Z0-9]|^)(d|dd|m|mm|y|yy|MM|M|DD|D)([^a-zA-Z0-9]|$)(.*)/;
        while (re.exec(str) != null) str = RegExp.$1 + RegExp.$2 + s[RegExp.$3] + RegExp.$4 + RegExp.$5;
        return str;
    }
    this.parseDate = function (str, fmt) {
        var y = 0;
        var m = -1;
        var d = 0;
        var a = str.split(/[^a-zA-Z0-9]+/);
        if (!fmt) fmt = this.dateFormat;
        var b = fmt.split(/[^a-zA-Z0-9]+/);
        for (var i = 0; i < a.length; ++i) {
            if (b[i] == 'D' || b[i] == 'DD') continue;
            if (b[i] == 'd' || b[i] == 'dd') d = a[i];
            if (b[i] == 'm' || b[i] == 'mm') m = a[i] - 1;
            if (b[i] == 'y') y = a[i];
            if (b[i] == 'yy') y = parseInt(a[i]) + 1900;
            if (b[i] == 'M' || b[i] == 'MM')
                for (var j = 0; j < 12; ++j)
                    if (_MN[j].substr(0, a[i].length).toLowerCase() == a[i].toLowerCase()) {
                        m = j;
                        break;
                    }
        }
        if (y != 0 && m != -1 && d != 0) {
            this.setDate(new Date(y, m, d));
            return;
        }
        y = 0;
        m = -1;
        d = 0;
        for (var i = 0; i < a.length; ++i) {
            if (a[i].search(/[a-zA-Z]+/) != -1) {
                var t = -1;
                for (var j = 0; j < 12; ++j)
                    if (_MN[j].substr(0, a[i].length).toLowerCase() == a[i].toLowerCase()) {
                        t = j;
                        break;
                    }
                if (t != -1) {
                    if (m != -1) d = m + 1;
                    m = t;
                }
            } else if (parseInt(a[i]) <= 12 && m == -1) m = a[i] - 1;
            else if (parseInt(a[i]) > 31 && y == 0) y = a[i];
            else if (d == 0) d = a[i];
        }
        if (y == 0) {
            var today = new Date();
            y = today.getFullYear();
        }
        if (m != -1 && d != 0) this.setDate(new Date(y, m, d));
    }

    if (yourHandler) this.yourHandler = yourHandler;
    if (yourCloseHandler) this.yourCloseHandler = yourCloseHandler;

    this.setRange(1970, 2050);
    this.dragging = false;
    this.setDateFormat("y-mm-dd");

    var date = null;
    if (dateStr) date = new Date(dateStr);
    else date = new Date();

    var table = document.createElement("table");
    this.table = table;
    table.cellSpacing = 0;
    table.cellPadding = 0;
    table.calendar = this;
    addEvent(table, "mousedown", tableMouseDown);

    var div = document.createElement("div");
    this.element = div;
    div.className = "calendar";
    div.style.position = "absolute";
    div.style.visibility = "hidden";
    div.appendChild(table);

    var thead = document.createElement("thead");
    table.appendChild(thead);
    var row = document.createElement("tr");
    thead.appendChild(row);
    row.className = "headrow";
    var cal = this;
    var cell = null;

    var add_evs = function (el) {
        addEvent(el, "mouseover", dayMouseOver);
        addEvent(el, "mousedown", dayMouseDown);
        addEvent(el, "mouseout", dayMouseOut);
        if (is_ie) {
            addEvent(el, "dblclick", dayMouseDblClick);
            el.setAttribute("unselectable", true);
        }
    }

    var hh = function (text, cs, navtype) {
        cell = document.createElement("td");
        row.appendChild(cell);
        if (cs != 1) {
            cell.colSpan = cs;
            cell.className = "title";
        }
        else cell.className = "head";
        add_evs(cell);
        cell.calendar = cal;
        cell.navtype = navtype;
        if (text.substr(0, 1) != '&') cell.appendChild(document.createTextNode(text));
        else cell.innerHTML = text;
        return cell;
    }

    hh("&#x00ab;", 1, -2).ttip = _etiquetas[0];
    hh("&#x2039;", 1, -1).ttip = _etiquetas[1];
    this.title = hh("", 3, 0);
    this.title.ttip = _etiquetas[2];
    hh("&#x203a;", 1, 1).ttip = _etiquetas[3];
    hh("&#x00bb;", 1, 2).ttip = _etiquetas[4];

    row = document.createElement("tr");
    thead.appendChild(row);
    row.className = "daynames";
    for (var i = 0; i < 7; ++i) {
        cell = document.createElement("td");
        row.appendChild(cell);
        cell.appendChild(document.createTextNode(""));
        if (!i) {
            cell.navtype = 100;
            cell.calendar = this;
            add_evs(cell);
        }
    }
    this.mondayFirst = mondayFirst;
    this.displayWeekdays();

    var tbody = document.createElement("tbody");
    table.appendChild(tbody);

    for (var i = 0; i < 6; ++i) {
        row = document.createElement("tr");
        tbody.appendChild(row);
        for (var j = 0; j < 7; ++j) {
            cell = document.createElement("td");
            row.appendChild(cell);
            cell.appendChild(document.createTextNode(""));
            cell.calendar = this;
            add_evs(cell);
        }
    }

    var tfoot = document.createElement("tfoot");
    table.appendChild(tfoot);
    row = document.createElement("tr");
    tfoot.appendChild(row);
    row.className = "footrow";
    for (var i = 0; i < 2; ++i) {
        cell = document.createElement("td");
        row.appendChild(cell);
        cell.calendar = this;
        if (!i) {
            this.tooltips = cell;
            cell.className = "ttip";
            cell.style.cursor = "move";
            cell.colSpan = 6;
            cell.navtype = 300;
            cell.appendChild(document.createTextNode(_etiquetas[5]));
            cell.ttip = _etiquetas[6];
        } else {
            cell.colSpan = 1;
            cell.appendChild(document.createTextNode("X"));
            cell.className = "button";
            cell.navtype = 200;
            cell.ttip = _etiquetas[9];
        }
        add_evs(cell);
    }

    var div = document.createElement("div");
    this.monthsCombo = div;
    div.className = "combo";
    div.style.position = "absolute";
    div.style.visibility = "hidden";
    for (var i = 0; i < _MN.length; ++i) {
        var mn = document.createElement("div");
        mn.className = "label";
        mn.month = i;
        mn.appendChild(document.createTextNode(_MN[i].substr(0, 3)));
        div.appendChild(mn);
    }
    this.element.appendChild(div);

    div = document.createElement("div");
    this.yearsCombo = div;
    div.className = "combo";
    div.style.position = "absolute";
    div.style.visibility = "hidden";
    for (var i = 0; i < 12; ++i) {
        var yr = document.createElement("div");
        yr.className = "label";
        yr.appendChild(document.createTextNode(""));
        div.appendChild(yr);
    }
    this.element.appendChild(div);

    this.init(mondayFirst, date);
    parent.appendChild(this.element);
}


/*******************************************************************************************************/


var calendar = null;
// remember the calendar object so that we reuse it and
// avoid creation other calendars.
// code from http://www.meyerweb.com, change the active stylesheet.
function setActiveStyleSheet(title) {
    var i, a, main;
    for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) {
        if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
            a.disabled = true;
            if (a.getAttribute("title") == title) a.disabled = false;
        }
    }
    document.getElementById("style").innerHTML = title;
    return false;
}

// This function gets called when the end-user clicks on some date.
function selected(cal, date) {
    cal.sel.value = date;
    // just update the date in the input field.
}

// And this gets called when the end-user clicks on the _selected_ date,
// or clicks on the "Close" button.  It just hides the calendar without
// destroying it.
function closeHandler(cal) {
    cal.hide();
    // hide the calendar

    // don"t check mousedown on document anymore (used to be able to hide the
    // calendar when someone clicks outside it, see the showCalendar function).
    removeEvent(document, "mousedown", checkCalendar);
}

// This gets called when the user presses a mouse button anywhere in the
// document, if the calendar is shown.  If the click was outside the open
// calendar this function closes it.
function checkCalendar(ev) {
    var el = is_ie ? getElement(ev) : getTargetElement(ev);
    for (; el != null; el = el.parentNode)
    // FIXME: allow end-user to click some link without closing the
    // calendar.  Good to see real-time stylesheet change :)
        if (el == calendar.element || el.tagName == "A") break;
    if (el == null) {
        // calls closeHandler which should hide the calendar.
        calendar.callCloseHandler();
        stopEvent(ev);
    }
}

// This function shows the calendar under the element having the given id.
// It takes care of catching "mousedown" signals on document and hiding the
// calendar if the click was outside.
function showCalendar(id, format) {
    var el = document.getElementById(id);
    if (calendar != null) {
        // we already have some calendar created
        calendar.hide();
        // so we hide it first.
    } else {
        // first-time call, create the calendar.
        var cal = new Calendar(true, null, selected, closeHandler);
        calendar = cal;
        // remember it in the global var
        cal.setRange(1900, 2070);
        // min/max year allowed.
    }
    calendar.setDateFormat(format);
    // set the specified date format
    calendar.parseDate(el.value);
    // try to parse the text in field
    calendar.sel = el;
    // inform it what input field we use
    calendar.showAtElement(el);
    // show the calendar below it

    // catch "mousedown" on document
    addEvent(document, "mousedown", checkCalendar);
    return false;
}