var weekend = [0,6];
var weekendColor = "#e0e0e0";
var fontface = "Verdana";
var fontsize = 2;

var gNow = new Date();
var ggWinCal;
isNav = (navigator.appName.indexOf("Netscape") != -1) ? true : false;
isIE = (navigator.appName.indexOf("Microsoft") != -1) ? true : false;

Calendar.Months = ["<img src='/img/m_jan.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_feb.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_mar.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_apr.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_may.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_jun.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_jul.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_aug.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_sep.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_oct.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_nov.gif' width='80' height='16' align='top'>",
                   "<img src='/img/m_dec.gif' width='80' height='16' align='top'>"];

// Non-Leap year Month days..
Calendar.DOMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
// Leap year Month days..
Calendar.lDOMonth = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];

function Calendar(p_item, p_WinCal, p_month, p_year, p_format) {
        if ((p_month == null) && (p_year == null))      return;

        if (p_WinCal == null)
                this.gWinCal = ggWinCal;
        else
                this.gWinCal = p_WinCal;
        
        if (p_month == null) {
                this.gMonthName = null;
                this.gMonth = null;
                this.gYearly = true;
        } else {
                this.gMonthName = Calendar.get_month(p_month);
                this.gMonth = new Number(p_month);
                this.gYearly = false;
        }

        this.gYear = p_year;
        this.gFormat = p_format;
        this.gBGColor = "white";
        this.gFGColor = "black";
        this.gTextColor = "black";
        this.gHeaderColor = "black";
        this.gReturnItem = p_item;
}

Calendar.get_month = Calendar_get_month;
Calendar.get_daysofmonth = Calendar_get_daysofmonth;
Calendar.calc_month_year = Calendar_calc_month_year;
Calendar.print = Calendar_print;

function Calendar_get_month(monthNo) {
        return Calendar.Months[monthNo];
}

function Calendar_get_daysofmonth(monthNo, p_year) {
        /* 
        Check for leap year ..
        1.Years evenly divisible by four are normally leap years, except for... 
        2.Years also evenly divisible by 100 are not leap years, except for... 
        3.Years also evenly divisible by 400 are leap years. 
        */
        if ((p_year % 4) == 0) {
                if ((p_year % 100) == 0 && (p_year % 400) != 0)
                        return Calendar.DOMonth[monthNo];
        
                return Calendar.lDOMonth[monthNo];
        } else
                return Calendar.DOMonth[monthNo];
}

function Calendar_calc_month_year(p_Month, p_Year, incr) {
        /* 
        Will return an 1-D array with 1st element being the calculated month 
        and second being the calculated year 
        after applying the month increment/decrement as specified by 'incr' parameter.
        'incr' will normally have 1/-1 to navigate thru the months.
        */
        var ret_arr = new Array();
        
        if (incr == -1) {
                // B A C K W A R D
                if (p_Month == 0) {
                        ret_arr[0] = 11;
                        ret_arr[1] = parseInt(p_Year) - 1;
                }
                else {
                        ret_arr[0] = parseInt(p_Month) - 1;
                        ret_arr[1] = parseInt(p_Year);
                }
        } else if (incr == 1) {
                // F O R W A R D
                if (p_Month == 11) {
                        ret_arr[0] = 0;
                        ret_arr[1] = parseInt(p_Year) + 1;
                }
                else {
                        ret_arr[0] = parseInt(p_Month) + 1;
                        ret_arr[1] = parseInt(p_Year);
                }
        }
        
        return ret_arr;
}

function Calendar_print() {
        ggWinCal.print();
}

function Calendar_calc_month_year(p_Month, p_Year, incr) {
        /* 
        Will return an 1-D array with 1st element being the calculated month 
        and second being the calculated year 
        after applying the month increment/decrement as specified by 'incr' parameter.
        'incr' will normally have 1/-1 to navigate thru the months.
        */
        var ret_arr = new Array();
        
        if (incr == -1) {
                // B A C K W A R D
                if (p_Month == 0) {
                        ret_arr[0] = 11;
                        ret_arr[1] = parseInt(p_Year) - 1;
                }
                else {
                        ret_arr[0] = parseInt(p_Month) - 1;
                        ret_arr[1] = parseInt(p_Year);
                }
        } else if (incr == 1) {
                // F O R W A R D
                if (p_Month == 11) {
                        ret_arr[0] = 0;
                        ret_arr[1] = parseInt(p_Year) + 1;
                }
                else {
                        ret_arr[0] = parseInt(p_Month) + 1;
                        ret_arr[1] = parseInt(p_Year);
                }
        }
        
        return ret_arr;
}

Calendar.prototype.getMonthlyCalendarCode = function() {
        var vCode = "";
        var vHeader_Code = "";
        var vData_Code = "";
        
        // Begin Table Drawing code here..
        vCode = vCode + "<table cellpadding='0' cellspacing='1' border='0' width='200' class='adm_table'>";
        vHeader_Code = this.cal_header();
        vData_Code = this.cal_data();
        vCode = vCode + vHeader_Code + vData_Code;
        
        vCode = vCode + "</table>";
        
        return vCode;
}

Calendar.prototype.show = function() {
        var vCode = "";
        
        this.gWinCal.document.open();

        // Setup the page...
        this.wwrite("<html>");
        this.wwrite("<link REL='stylesheet' href='/css/main.css' type='text/css'>");
//        this.wwrite("<META http-equiv='Content-Type' content='text/html; charset=koi8-r'>");
        this.wwrite("</head>");

        this.wwrite("<body topmargin='0' leftmargin='0' style='background-color: white'>");

        var prevMMYYYY = Calendar.calc_month_year(this.gMonth, this.gYear, -1);
        var prevMM = prevMMYYYY[0];
        var prevYYYY = prevMMYYYY[1];

        var nextMMYYYY = Calendar.calc_month_year(this.gMonth, this.gYear, 1);
        var nextMM = nextMMYYYY[0];
        var nextYYYY = nextMMYYYY[1];

        this.wwrite("<table cellpadding='0' cellspacing='0' border='0' width='200'>");
        this.wwrite("<tr><td align='left' style='font-size: 14px; font-weight: bold'>");
        this.wwrite("<a href=\"javascript:window.opener.Build(" +
            "'" + this.gReturnItem + "','" + prevMM + "','" +
            prevYYYY + "','" + this.gFormat + "'" + ");\">");
        this.wwrite("<img src='/img/left.gif' border='0' align='top' width='15' height='15'></a>");
        this.wwrite(this.gMonthName);
        this.wwrite("<a href=\"javascript:window.opener.Build(" +
            "'" + this.gReturnItem + "','" + nextMM + "','" +
            nextYYYY + "','" + this.gFormat + "'" + ");\">");
        this.wwrite("<img src='/img/right.gif' border='0' align='top' width='15' height='15'></a>");
        this.wwrite("</td>");
        this.wwrite("<td align='right' style='font-size: 14px; font-weight: bold'>");
        this.wwrite("<a href=\"javascript:window.opener.Build(" +
            "'" + this.gReturnItem + "','" + this.gMonth + "','" +
            (parseInt(this.gYear) - 1) + "','" + this.gFormat + "'" + ");\">");
        this.wwrite("<img src='/img/left.gif' border='0' align='top' width='15' height='15'></a>");
        this.wwrite(this.gYear);
        this.wwrite("<a href=\"javascript:window.opener.Build(" +
            "'" + this.gReturnItem + "','" + this.gMonth + "','" +
            (parseInt(this.gYear) + 1) + "','" + this.gFormat + "'" + ");\">");
        this.wwrite("<img src='/img/right.gif' border='0' align='top' width='15' height='15'></a>");
        this.wwrite("</td></tr></table><br>");

        // Get the complete calendar code for the month..
        vCode = this.getMonthlyCalendarCode();
        this.wwrite(vCode);

        this.wwrite("</body></html>");
        this.gWinCal.document.close();
}

Calendar.prototype.wwrite = function(wtext) {
        this.gWinCal.document.writeln(wtext);
}

Calendar.prototype.wwriteA = function(wtext) {
        this.gWinCal.document.write(wtext);
}

Calendar.prototype.cal_header = function() {
        var vCode = "";
        
        vCode = vCode + "<tr>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_mon.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_tue.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_wed.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_thi.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_fri.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_sat.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "<td class='adm_title'><img src='/img/d_sun.gif' width='20' height='16' align='top'></td>";
        vCode = vCode + "</tr>";
        
        return vCode;
}

Calendar.prototype.cal_data = function() {
        var vDate = new Date();
        vDate.setDate(1);
        vDate.setMonth(this.gMonth);
        vDate.setFullYear(this.gYear);

        var vFirstDay=vDate.getDay() - 1;
        if (vFirstDay < 0) vFirstDay = 6;
        var vDay=1;
        var vLastDay=Calendar.get_daysofmonth(this.gMonth, this.gYear);
        var vOnLastDay=0;
        var vCode = "";

        /*
        Get day for the 1st of the requested month/year..
        Place as many blank cells before the 1st day of the month as necessary. 
        */

        vCode = vCode + "<tr>";
        for (i=0; i<vFirstDay; i++) {
                vCode = vCode + "<td class='adm_cont' align='center'>&nbsp;</td>";
        }

        // Write rest of the 1st week
        for (j=vFirstDay; j<7; j++) {
            vCode = vCode + "<td class='adm_cont' align='center'>" +
                "<a href='#' style='text-decoration: none'" +
                "onClick=\"self.opener.document." + this.gReturnItem + ".value='" +
                this.format_data(vDay) + "';window.close();\">" +
                this.format_day(vDay) + "</a></td>";
                vDay=vDay + 1;
        }
        vCode = vCode + "</tr>";

        // Write the rest of the weeks
        for (k=2; k<7; k++) {
            vCode = vCode + "<tr>";

            for (j=0; j<7; j++) {
                vCode = vCode + "<td class='adm_cont' align='center'>" +
                    "<a href='#' style='text-decoration: none'" +
                    "onClick=\"self.opener.document." + this.gReturnItem +
                    ".value='" + this.format_data(vDay) + "';window.close();\">" +
                    this.format_day(vDay) + "</a></td>";
                vDay=vDay + 1;

                if (vDay > vLastDay) {
                    vOnLastDay = 1;
                    break;
                }
            }

            if (vOnLastDay == 1) break;
        }
        
        for (m=1; m<(7-j); m++) {
                if (this.gYearly)
                    vCode = vCode + "<td class='adm_cont' align='center'>&nbsp;</td>";
                else
                    vCode = vCode + "<td class='adm_cont' align='center'>" + m + "</td>";
        }
        vCode = vCode + "</tr>";
        
        return vCode;
}

Calendar.prototype.format_day = function(vday) {
        var vNowDay = gNow.getDate();
        var vNowMonth = gNow.getMonth();
        var vNowYear = gNow.getFullYear();

        if (vday == vNowDay && this.gMonth == vNowMonth && this.gYear == vNowYear)
                return ("<span style=\"color: red\">" + vday + "</span>");
        else
                return (vday);
}

Calendar.prototype.format_data = function(p_day) {
        var vData;
        var vMonth = 1 + this.gMonth;
        vMonth = (vMonth.toString().length < 2) ? "0" + vMonth : vMonth;
        var vMon = Calendar.get_month(this.gMonth).substr(0,3).toUpperCase();
        var vFMon = Calendar.get_month(this.gMonth).toUpperCase();
        var vY4 = new String(this.gYear);
        var vY2 = new String(this.gYear.substr(2,2));
        var vDD = (p_day.toString().length < 2) ? "0" + p_day : p_day;

        switch (this.gFormat) {
                case "MM\/DD\/YYYY" :
                        vData = vMonth + "\/" + vDD + "\/" + vY4;
                        break;
                case "MM\/DD\/YY" :
                        vData = vMonth + "\/" + vDD + "\/" + vY2;
                        break;
                case "MM-DD-YYYY" :
                        vData = vMonth + "-" + vDD + "-" + vY4;
                        break;
                case "MM-DD-YY" :
                        vData = vMonth + "-" + vDD + "-" + vY2;
                        break;

                case "DD\/MON\/YYYY" :
                        vData = vDD + "\/" + vMon + "\/" + vY4;
                        break;
                case "DD\/MON\/YY" :
                        vData = vDD + "\/" + vMon + "\/" + vY2;
                        break;
                case "DD-MON-YYYY" :
                        vData = vDD + "-" + vMon + "-" + vY4;
                        break;
                case "DD-MON-YY" :
                        vData = vDD + "-" + vMon + "-" + vY2;
                        break;

                case "DD\/MONTH\/YYYY" :
                        vData = vDD + "\/" + vFMon + "\/" + vY4;
                        break;
                case "DD\/MONTH\/YY" :
                        vData = vDD + "\/" + vFMon + "\/" + vY2;
                        break;
                case "DD-MONTH-YYYY" :
                        vData = vDD + "-" + vFMon + "-" + vY4;
                        break;
                case "DD-MONTH-YY" :
                        vData = vDD + "-" + vFMon + "-" + vY2;
                        break;

                case "DD\/MM\/YYYY" :
                        vData = vDD + "\/" + vMonth + "\/" + vY4;
                        break;
                case "DD\/MM\/YY" :
                        vData = vDD + "\/" + vMonth + "\/" + vY2;
                        break;
                case "DD-MM-YYYY" :
                        vData = vDD + "-" + vMonth + "-" + vY4;
                        break;
                case "DD-MM-YY" :
                        vData = vDD + "-" + vMonth + "-" + vY2;
                        break;
                case "DD.MM.YYYY" :
                        vData = vDD + "." + vMonth + "." + vY4;
                        break;

                default :
                        vData = vDD + "." + vMonth + "." + vY4;
        }

        return vData;
}

function Build(p_item, p_month, p_year, p_format) {
        var p_WinCal = ggWinCal;
        gCal = new Calendar(p_item, p_WinCal, p_month, p_year, p_format);

        // Customize your Calendar here..
        gCal.gBGColor="white";
        gCal.gLinkColor="black";
        gCal.gTextColor="black";
        gCal.gHeaderColor="darkgreen";

        // Choose appropriate show function
        if (gCal.gYearly)       gCal.showY();
        else    gCal.show();
}

function show_calendar() {
        /* 
                p_month : 0-11 for Jan-Dec; 12 for All Months.
                p_year  : 4-digit year
                p_format: Date format (mm/dd/yyyy, dd/mm/yy, ...)
                p_item  : Return Item.
        */

        p_item = arguments[0];
        if (arguments[1] == null)
                p_month = new String(gNow.getMonth());
        else
                p_month = arguments[1];
        if (arguments[2] == "" || arguments[2] == null)
                p_year = new String(gNow.getFullYear().toString());
        else
                p_year = arguments[2];
        if (arguments[3] == null)
                p_format = "DD.MM.YYYY";
        else
                p_format = arguments[3];

        vWinCal = window.open("", "Календар", 
                "width=210,height=190,status=no,resizable=no,top=200,left=200");
        vWinCal.opener = self;
        ggWinCal = vWinCal;

        Build(p_item, p_month, p_year, p_format);
}