/* Author: Mihai Bazon, September 2002
* http://students.infoiasi.ro/~mishoo
*
* Version: 0.9
*
* 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.
*/

// the Calendar object constructor.
Calendar = function (mondayFirst, dateStr, yourHandler, yourCloseHandler) {
    // member variables
    this.activeDateEl = null;
    this.activeMonEl = null;
    this.activeYearEl = null;
    this.currentDateEl = null;
    this.disabledHandler = null;
    this.timeout = null;
    this.yourHandler = yourHandler || null;
    this.yourCloseHandler = yourCloseHandler || null;
    this.dragging = false;
    this.minYear = 2010;
    this.maxYear = 2012;
    this.dateFormat = "y-mm-dd";
    this.isPopup = true;
    //this.mondayFirst = mondayFirst;
    this.dateStr = dateStr;
    this.monthsCombo = null;
};

// ** constants

// "static", needed for event handlers.
Calendar._C = null;

Calendar.is_ie = ((navigator.userAgent.toLowerCase().indexOf("msie") != -1) &&
		   (navigator.userAgent.toLowerCase().indexOf("opera") == -1));
Calendar._MD = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

// ** public functions (these can be thought as static, since none of them use
// ** "this" and they can be accessed without using an instance of the object).

Calendar.getAbsolutePos = function (el) {
    var r = { x: el.offsetLeft, y: el.offsetTop };
    if (el.offsetParent) {
        var tmp = Calendar.getAbsolutePos(el.offsetParent);
        r.x += tmp.x;
        r.y += tmp.y;
    }
    return r;
};

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

Calendar._del_evs = function (el) {
    Calendar.removeEvent(el, "mouseover", Calendar.dayMouseOver);
    Calendar.removeEvent(el, "mousedown", Calendar.dayMouseDown);
    Calendar.removeEvent(el, "mouseout", Calendar.dayMouseOut);
    if (Calendar.is_ie) {
        Calendar.removeEvent(el, "dblclick", Calendar.dayMouseDblClick);
    }
};

Calendar.isRelated = function (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;
};

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

Calendar.removeClass = function (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(" ");
};

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

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

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

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

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

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

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

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

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

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

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

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

Calendar.showYearsCombo = function (fwd) {
    var cal = Calendar._C;
    if (!cal) {
        return false;
    }
    var cal = cal;
    var cd = cal.activeDateEl;
    var yc = cal.yearsCombo;
    if (cal.activeYearEl) {
        Calendar.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.display = "block";
    }
};

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

Calendar.calDragEnd = function (ev) {
    var cal = Calendar._C;
    cal.dragging = false;
    Calendar.removeEvent(document, "mousemove", Calendar.calDragIt);
    Calendar.removeEvent(document, "mouseover", Calendar.stopEvent);
    Calendar.removeEvent(document, "mouseup", Calendar.calDragEnd);
    Calendar.tableMouseUp(ev);
    cal.hideShowCovered();
};

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

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

Calendar.dayMouseOver = function (ev) {
    var el = Calendar.getElement(ev);
    if (Calendar.isRelated(el, ev) || Calendar._C) {
        return false;
    }
    if (el.ttip) {
        el.calendar.tooltips.firstChild.data = el.ttip;
    }
    if (el.navtype != 300) {
        Calendar.addClass(el, "hilite");
    }
    Calendar.stopEvent(ev);
};

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

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

Calendar.cellClick = function (el) {
    var cal = el.calendar;
    var closing = false;
    var newdate = false;
    var date = null;
    if (typeof el.navtype == 'undefined') {
        Calendar.removeClass(cal.currentDateEl, "selected");
        Calendar.addClass(el, "selected");
        closing = cal.currentDateEl == el;
        if (!closing) {
            cal.currentDateEl = el;
        }
        date = el.caldate;
        cal.date = date;
        newdate = true;
    } else {
        if (el.navtype == 200) {
            Calendar.removeClass(el, "hilite");
            cal.callCloseHandler();
            return;
        }
        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 = Calendar.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 (!Calendar.datesEqual(date, cal.date)) {
            cal.setDate(date);
            newdate = el.navtype == 0;
        }
    }
    if (newdate) {
        cal.callHandler();
    }
    if (closing) {
        Calendar.removeClass(el, "hilite");
        cal.callCloseHandler();
    }
};

Calendar.prototype.create = function (_par) {
    var parent = null;
    if (!_par) {
        // default parent is the document body, in which case we create
        // a popup calendar.
        parent = document.getElementsByTagName("body")[0];
        this.isPopup = true;
    } else {
        parent = _par;
        this.isPopup = false;
    }
    this.date = this.dateStr ? new Date(this.dateStr) : new Date();

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

    var div = document.createElement("div");
    this.element = div;
    div.className = "calendar";
    if (this.isPopup) {
        div.style.position = "absolute";
        div.style.display = "none";
    }
    div.appendChild(table);

    var thead = document.createElement("thead");
    table.appendChild(thead);
    var cell = null;
    var row = null;

    var cal = this;
    var hh = function (text, cs, navtype) {
        cell = document.createElement("td");
        row.appendChild(cell);
        cell.colSpan = cs;
        cell.className = "button";
        Calendar._add_evs(cell);
        cell.calendar = cal;
        cell.navtype = navtype;
        if (text.substr(0, 1) != '&') {
            cell.appendChild(document.createTextNode(text));
        }
        else {
            // FIXME: dirty hack for entities

            cell.innerHTML = text;
        }
        return cell;
    };

    row = document.createElement("tr");
    thead.appendChild(row);
    row.className = "headrow";

    this.title = hh("", this.isPopup ? 5 : 5, 300);
    hh("&laquo;", 1, -1).ttip = Calendar._TT["PREV_MONTH"];
    hh("&raquo;", 1, 1).ttip = Calendar._TT["NEXT_MONTH"];
    this.title.className = "title";
    if (this.isPopup) {
        this.title.ttip = Calendar._TT["DRAG_TO_MOVE"];
        this.title.style.cursor = "move";

    }

    row = document.createElement("tr");
    thead.appendChild(row);
    row.className = "headrow";

    // day names
    row = document.createElement("tr");
    thead.appendChild(row);
    row.className = "daynames";
    this.daynames = row;
    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;
            //Calendar._add_evs(cell);
        }
    }
    this.displayWeekdays();

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

    for (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;
        }
    }

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

    row = document.createElement("tr");
    tfoot.appendChild(row);
    row.className = "footrow";

    cell = hh(Calendar._TT["SEL_DATE"], 7, 300);
    cell.className = "ttip";
    if (this.isPopup) {
        cell.ttip = Calendar._TT["DRAG_TO_MOVE"];
        cell.style.cursor = "move";
    }
    this.tooltips = cell;

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

    div = document.createElement("div");
    this.yearsCombo = div;
    div.className = "combo";
    for (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(this.mondayFirst, this.date);
    parent.appendChild(this.element);
}

Calendar.prototype._init = function (mondayFirst, date) {
    var today = new 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 = Calendar.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) {
        var cell = row.firstChild;
        if (iday > no_days) {
            row.className = "emptyrow"; continue;
        } else {
            row.className = "daysrow";
            for (var j = 0; j < 7; ++j) {
                if ((!i && j < wday) || iday > no_days) {
                    cell.className = "emptycell";
                } else {
                    cell.firstChild.data = iday;
                    cell.className = "day";
                    date.setDate(iday);
                    if (this.disabledHandler && this.disabledHandler(date)) {
                        Calendar.addClass(cell, "disabled");
                        Calendar._del_evs(cell);
                    } else {
                        cell.caldate = new Date(date);
                        cell.ttip = ""
                        Calendar._add_evs(cell);
                        if (iday == mday) {
                            Calendar.addClass(cell, "selected");
                            this.currentDateEl = cell;
                        }
                        if (Calendar.datesEqual(date, today)) {
                            Calendar.addClass(cell, "today");
                            cell.ttip += Calendar._TT["PART_TODAY"];
                        }
                        if (wday == SAT || wday == SUN) {
                            Calendar.addClass(cell, "weekend");
                        }
                    }
                    ++wday; ++iday;
                    if (wday == 7) {
                        wday = 0;
                    }
                }
                cell = cell.nextSibling;
            }
        }
        row = row.nextSibling;
    }
    this.title.firstChild.data = Calendar._MN[month] + ", " + year;
};

Calendar.prototype.setDate = function (date) {
    if (!Calendar.datesEqual(date, this.date)) {
        this._init(this.mondayFirst, date);
    }
};

Calendar.prototype.setMondayFirst = function (mondayFirst) {
    this._init(mondayFirst, this.date);
    this.displayWeekdays();
};

Calendar.prototype.displayWeekdays = function () {
    var MON = this.mondayFirst ? 0 : 1;
    var SUN = this.mondayFirst ? 6 : 0;
    var SAT = this.mondayFirst ? 5 : 6;
    var cell = this.daynames.firstChild;
    for (var i = 0; i < 7; ++i) {
        cell.className = "day name";
        if (!i) {
            if (this.mondayFirst) {
                cell.ttip = Calendar._TT["SUN_FIRST"];
            } else {
                cell.ttip = Calendar._TT["MON_FIRST"];
            }
        }
        if (i == SUN || i == SAT) {
            Calendar.addClass(cell, "weekend");
        }
        cell.firstChild.data = Calendar._DN[i + 1 - MON].substr(0, 2);
        cell = cell.nextSibling;
    }
};

Calendar.prototype.setDisabledHandler = function (unaryFunction) {
    this.disabledHandler = unaryFunction;
};

Calendar.prototype.setRange = function (a, z) {
    this.minYear = a;
    this.maxYear = z;
};

Calendar.prototype.callHandler = function () {
    if (this.yourHandler) {
        this.yourHandler(this, this.formatDate());
    }
};

Calendar.prototype.callCloseHandler = function () {
    if (this.yourCloseHandler) {
        this.yourCloseHandler(this);
    }
    this.hideShowCovered();
};

Calendar.prototype.destroy = function () {
    var el = this.element.parentNode;
    el.removeChild(this.element);
    Calendar._C = null;
    delete el;
};

Calendar.prototype.reparent = function (new_parent) {
    var el = this.element;
    el.parentNode.removeChild(el);
    new_parent.appendChild(el);
};

Calendar.prototype.show = function () {
    this.element.style.display = "block";
    this.hideShowCovered();
};

Calendar.prototype.hide = function () {
    this.element.style.display = "none";
};

Calendar.prototype.showAt = function (x, y) {
    var s = this.element.style;
    s.left = x + "px";
    s.top = y + "px";
    this.show();
};

Calendar.prototype.showAtElement = function (el) {
    var p = Calendar.getAbsolutePos(el);
    this.showAt(p.x, p.y + el.offsetHeight);
};

Calendar.prototype.hideCombos = function () {
    this.monthsCombo.style.display = "none";
    this.yearsCombo.style.display = "none";
};

Calendar.prototype.dragStart = function (ev) {
    if (this.dragging) {
        return;
    }
    this.dragging = true;
    var posX;
    var posY;
    if (Calendar.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);
    Calendar.addEvent(document, "mousemove", Calendar.calDragIt);
    Calendar.addEvent(document, "mouseover", Calendar.stopEvent);
    Calendar.addEvent(document, "mouseup", Calendar.calDragEnd);
};

Calendar.prototype.setDateFormat = function (str) {
    this.dateFormat = str;
};

Calendar.prototype.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'] = Calendar._DN[w].substr(0, 3);
    s['DD'] = Calendar._DN[w];
    s['M'] = Calendar._MN[m].substr(0, 3);
    s['MM'] = Calendar._MN[m];
    var re = /(.*)(\W|^)(d|dd|m|mm|y|yy|MM|M|DD|D)(\W|$)(.*)/;
    while (re.exec(str) != null) {
        str = RegExp.$1 + RegExp.$2 + s[RegExp.$3] + RegExp.$4 + RegExp.$5;
    }
    return str;
};

Calendar.prototype.parseDate = function (str, fmt) {
    var y = 0;
    var m = -1;
    var d = 0;
    var a = str.split(/\W+/);
    if (!fmt) {
        fmt = this.dateFormat;
    }
    var b = fmt.split(/\W+/);
    var i = 0, j = 0;
    for (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]) + 2000;
        }
        if (b[i] == 'M' || b[i] == 'MM') {
            for (j = 0; j < 12; ++j) {
                if (Calendar._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 (i = 0; i < a.length; ++i) {
        if (a[i].search(/[a-zA-Z]+/) != -1) {
            var t = -1;
            for (j = 0; j < 12; ++j) {
                if (Calendar._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));
    }
};

Calendar.prototype.hideShowCovered = function () {
    var tags = new Array('applet', 'iframe', 'select');
    var el = this.element;

    var p = Calendar.getAbsolutePos(el);
    var EX1 = p.x;
    var EX2 = el.offsetWidth + EX1;
    var EY1 = p.y;
    var EY2 = el.offsetHeight + EY1;

    for (var k = 0; k < tags.length; k++) {
        var ar = document.getElementsByTagName(tags[k]);
        var cc = null;

        for (var i = 0; i < ar.length; i++) {
            cc = ar[i];

            p = Calendar.getAbsolutePos(cc);
            var CX1 = p.x;
            var CX2 = cc.offsetWidth + CX1;
            var CY1 = p.y;
            var CY2 = cc.offsetHeight + CY1;

            if ((CX1 > EX2) || (CX2 < EX1) || (CY1 > EY2) || (CY2 < EY1)) {
                cc.style.visibility = "visible";
            } else {
                cc.style.visibility = "hidden";
            }
        }
    }
};