// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
// ===================================================================

// Functions for IE to get position of an object
function AnchorPosition_getPageOffsetLeft (el) {
    var ol=el.offsetLeft;
    while ((el=el.offsetParent) != null) { ol += el.offsetLeft; }
    return ol;
    }
function AnchorPosition_getWindowOffsetLeft (el) {
    return AnchorPosition_getPageOffsetLeft(el)-document.body.scrollLeft;
    }    
function AnchorPosition_getPageOffsetTop (el) {
    var ot=el.offsetTop;
    while((el=el.offsetParent) != null) { ot += el.offsetTop; }
    return ot;
    }
function AnchorPosition_getWindowOffsetTop (el) {
    return AnchorPosition_getPageOffsetTop(el)-document.body.scrollTop;
    }

var MONTH_NAMES=new Array('January','February','March','April','May','June','July','August','September','October','November','December','Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
var DAY_NAMES=new Array('Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sun','Mon','Tue','Wed','Thu','Fri','Sat');
function LZ(x) {return(x<0||x>9?"":"0")+x}

function isDate(val,format) {
    var date=getDateFromFormat(val,format);
    if (date==0) { return false; }
    return true;
    }

function compareDates(date1,dateformat1,date2,dateformat2) {
    var d1=getDateFromFormat(date1,dateformat1);
    var d2=getDateFromFormat(date2,dateformat2);
    if (d1==0 || d2==0) {
        return -1;
        }
    else if (d1 > d2) {
        return 1;
        }
    return 0;
    }

function formatDate(date,format) {
    format=format+"";
    var result="";
    var i_format=0;
    var c="";
    var token="";
    var y=date.getYear()+"";
    var M=date.getMonth()+1;
    var d=date.getDate();
    var E=date.getDay();
    var H=date.getHours();
    var m=date.getMinutes();
    var s=date.getSeconds();
    var yyyy,yy,MMM,MM,dd,hh,h,mm,ss,ampm,HH,H,KK,K,kk,k;
    // Convert real date parts into formatted versions
    var value=new Object();
    if (y.length < 4) {y=""+(y-0+1900);}
    value["y"]=""+y;
    value["yyyy"]=y;
    value["yy"]=y.substring(2,4);
    value["M"]=M;
    value["MM"]=LZ(M);
    value["MMM"]=MONTH_NAMES[M-1];
    value["NNN"]=MONTH_NAMES[M+11];
    value["d"]=d;
    value["dd"]=LZ(d);
    value["E"]=DAY_NAMES[E+7];
    value["EE"]=DAY_NAMES[E];
    value["H"]=H;
    value["HH"]=LZ(H);
    if (H==0){value["h"]=12;}
    else if (H>12){value["h"]=H-12;}
    else {value["h"]=H;}
    value["hh"]=LZ(value["h"]);
    if (H>11){value["K"]=H-12;} else {value["K"]=H;}
    value["k"]=H+1;
    value["KK"]=LZ(value["K"]);
    value["kk"]=LZ(value["k"]);
    if (H > 11) { value["a"]="PM"; }
    else { value["a"]="AM"; }
    value["m"]=m;
    value["mm"]=LZ(m);
    value["s"]=s;
    value["ss"]=LZ(s);
    while (i_format < format.length) {
        c=format.charAt(i_format);
        token="";
        while ((format.charAt(i_format)==c) && (i_format < format.length)) {
            token += format.charAt(i_format++);
            }
        if (value[token] != null) { result=result + value[token]; }
        else { result=result + token; }
        }
    return result;
    }
    
// ------------------------------------------------------------------
// Utility functions for parsing in getDateFromFormat()
// ------------------------------------------------------------------
function _isInteger(val) {
    var digits="1234567890";
    for (var i=0; i < val.length; i++) {
        if (digits.indexOf(val.charAt(i))==-1) { return false; }
    }
    return true;
}

function _getInt(str,i,minlength,maxlength) {
    for (var x=maxlength; x>=minlength; x--) {
        var token=str.substring(i,i+x);
        if (token.length < minlength) { return null; }
        if (_isInteger(token)) { return token; }
    }
    return null;
}
    
function getDateFromFormat(val,format) {
    val=val+"";
    format=format+"";
    var i_val=0;
    var i_format=0;
    var c="";
    var token="";
    var token2="";
    var x,y;
    var now=new Date();
    var year=now.getYear();
    var month=now.getMonth()+1;
    var date=1;
    var hh=now.getHours();
    var mm=now.getMinutes();
    var ss=now.getSeconds();
    var ampm="";
    
    while (i_format < format.length) {
        // Get next token from format string
        c=format.charAt(i_format);
        token="";
        while ((format.charAt(i_format)==c) && (i_format < format.length)) {
            token += format.charAt(i_format++);
            }
        // Extract contents of value based on format token
        if (token=="yyyy" || token=="yy" || token=="y") {
            if (token=="yyyy") { x=4;y=4; }
            if (token=="yy")   { x=2;y=2; }
            if (token=="y")    { x=2;y=4; }
            year=_getInt(val,i_val,x,y);
            if (year==null) { return 0; }
            i_val += year.length;
            if (year.length==2) {
                if (year > 70) { year=1900+(year-0); }
                else { year=2000+(year-0); }
                }
            }
        else if (token=="MMM"||token=="NNN"){
            month=0;
            for (var i=0; i<MONTH_NAMES.length; i++) {
                var month_name=MONTH_NAMES[i];
                if (val.substring(i_val,i_val+month_name.length).toLowerCase()==month_name.toLowerCase()) {
                    if (token=="MMM"||(token=="NNN"&&i>11)) {
                        month=i+1;
                        if (month>12) { month -= 12; }
                        i_val += month_name.length;
                        break;
                        }
                    }
                }
            if ((month < 1)||(month>12)){return 0;}
            }
        else if (token=="EE"||token=="E"){
            for (var i=0; i<DAY_NAMES.length; i++) {
                var day_name=DAY_NAMES[i];
                if (val.substring(i_val,i_val+day_name.length).toLowerCase()==day_name.toLowerCase()) {
                    i_val += day_name.length;
                    break;
                    }
                }
            }
        else if (token=="MM"||token=="M") {
            month=_getInt(val,i_val,token.length,2);
            if(month==null||(month<1)||(month>12)){return 0;}
            i_val+=month.length;}
        else if (token=="dd"||token=="d") {
            date=_getInt(val,i_val,token.length,2);
            if(date==null||(date<1)||(date>31)){return 0;}
            i_val+=date.length;}
        else if (token=="hh"||token=="h") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<1)||(hh>12)){return 0;}
            i_val+=hh.length;}
        else if (token=="HH"||token=="H") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<0)||(hh>23)){return 0;}
            i_val+=hh.length;}
        else if (token=="KK"||token=="K") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<0)||(hh>11)){return 0;}
            i_val+=hh.length;}
        else if (token=="kk"||token=="k") {
            hh=_getInt(val,i_val,token.length,2);
            if(hh==null||(hh<1)||(hh>24)){return 0;}
            i_val+=hh.length;hh--;}
        else if (token=="mm"||token=="m") {
            mm=_getInt(val,i_val,token.length,2);
            if(mm==null||(mm<0)||(mm>59)){return 0;}
            i_val+=mm.length;}
        else if (token=="ss"||token=="s") {
            ss=_getInt(val,i_val,token.length,2);
            if(ss==null||(ss<0)||(ss>59)){return 0;}
            i_val+=ss.length;}
        else if (token=="a") {
            if (val.substring(i_val,i_val+2).toLowerCase()=="am") {ampm="AM";}
            else if (val.substring(i_val,i_val+2).toLowerCase()=="pm") {ampm="PM";}
            else {return 0;}
            i_val+=2;}
        else {
            if (val.substring(i_val,i_val+token.length)!=token) {return 0;}
            else {i_val+=token.length;}
            }
        }
    // If there are any trailing characters left in the value, it doesn't match
    if (i_val != val.length) { return 0; }
    // Is date valid for month?
    if (month==2) {
        // Check for leap year
        if ( ( (year%4==0)&&(year%100 != 0) ) || (year%400==0) ) { // leap year
            if (date > 29){ return 0; }
            }
        else { if (date > 28) { return 0; } }
        }
    if ((month==4)||(month==6)||(month==9)||(month==11)) {
        if (date > 30) { return 0; }
        }
    // Correct hours value
    if (hh<12 && ampm=="PM") { hh=hh-0+12; }
    else if (hh>11 && ampm=="AM") { hh-=12; }
    var newdate=new Date(year,month-1,date,hh,mm,ss);
    return newdate.getTime();
    }

function parseDate(val) {
    var preferEuro=(arguments.length==2)?arguments[1]:false;
    generalFormats=new Array('y-M-d','MMM d, y','MMM d,y','y-MMM-d','d-MMM-y','MMM d');
    monthFirst=new Array('M/d/y','M-d-y','M.d.y','MMM-d','M/d','M-d');
    dateFirst =new Array('d/M/y','d-M-y','d.M.y','d-MMM','d/M','d-M');
    var checkList=new Array('generalFormats',preferEuro?'dateFirst':'monthFirst',preferEuro?'monthFirst':'dateFirst');
    var d=null;
    for (var i=0; i<checkList.length; i++) {
        var l=window[checkList[i]];
        for (var j=0; j<l.length; j++) {
            d=getDateFromFormat(val,l[j]);
            if (d!=0) { return new Date(d); }
        }
    }
    return null;
}

// Set the position of the popup window based on the anchor
function PopupWindow_getXYPosition(anchorname) {
    var coordinates;
    if (this.type == "WINDOW") {
        coordinates = getAnchorWindowPosition(anchorname);
    } else {
        coordinates = getAnchorPosition(anchorname);
    }
    this.x = coordinates.x;
    this.y = coordinates.y;
}

// Set width/height of DIV/popup window
function PopupWindow_setSize(width,height) {
    this.width = width;
    this.height = height;
}

// Fill the window with contents
function PopupWindow_populate(contents) {
    this.contents = contents;
    this.populated = false;
}

// Set the URL to go to
function PopupWindow_setUrl(url) {
    this.url = url;
}

// Set the window popup properties
function PopupWindow_setWindowProperties(props) {
    this.windowProperties = props;
}

// Refresh the displayed contents of the popup
function PopupWindow_refresh() {
    if (this.divName != null) {
        // refresh the DIV object
        if (this.use_gebi) {
            document.getElementById(this.divName).innerHTML = this.contents;
            }
        else if (this.use_css) { 
            document.all[this.divName].innerHTML = this.contents;
            }
        else if (this.use_layers) { 
            var d = document.layers[this.divName]; 
            d.document.open();
            d.document.writeln(this.contents);
            d.document.close();
            }
        }
    else {
        if (this.popupWindow != null && !this.popupWindow.closed) {
            if (this.url!="") {
                this.popupWindow.location.href=this.url;
                }
            else {
                this.popupWindow.document.open();
                this.popupWindow.document.writeln(this.contents);
                this.popupWindow.document.close();
            }
            this.popupWindow.focus();
            }
        }
    }

// let's change this to take advantage of prototype
function PopupWindow_showPopup(anchorname) {
    var offsets;
    offsets = Position.cumulativeOffset($(anchorname));
    if (this.homepage) {
     	if (TRAVELBUG.guiUtils.isIE) {
            this.x = offsets[0] + 14;
            this.y = offsets[1] + 12;
        } else {
            this.x = offsets[0] + 15;
            this.y = offsets[1] + 9;
        }
    } else {
        if (TRAVELBUG.guiUtils.isIE) {
            this.x = offsets[0] + 11;
            this.y = offsets[1] + 11;
        } else {
            this.x = offsets[0] + 12;
            this.y = offsets[1] + 8;
        }
    }
    if (!this.populated && (this.contents != "")) {
        this.populated = true;
        this.refresh();
    }
    $(this.divName).setStyle({left: this.x + 'px', top: this.y + 'px', visibility: 'visible'});
}

// Hide the popup
function PopupWindow_hidePopup() {
    if (this.divName != null) {
        $(this.divName).setStyle({visibility: 'hidden'});
    }
}

// Pass an event and return whether or not it was the popup DIV that was clicked
function PopupWindow_isClicked(e) {
    if (this.divName != null) {
        if (this.use_layers) {
            var clickX = e.pageX;
            var clickY = e.pageY;
            var t = document.layers[this.divName];
            if ((clickX > t.left) && (clickX < t.left+t.clip.width) && (clickY > t.top) && (clickY < t.top+t.clip.height)) {
                return true;
            } else {
                return false;
            }
        } else if (document.all) { // Need to hard-code this to trap IE for error-handling
            var t = window.event.srcElement;
            while (t.parentElement != null) {
                if (t.id==this.divName) {
                    return true;
                }
                t = t.parentElement;
            }
            return false;
        } else if (this.use_gebi && e) {
            try {
                var t = e.target;
                if (undefined !== t && undefined !== t.parentNode) {
                    while (t.parentNode != null) {
                        if (t.id==this.divName) {
                            return true;
                        }
                        t = t.parentNode;
                    }
                }
            } catch (e) {}
            return false;
        }
        return false;
    }
    return false;
}

// Check an onMouseDown event to see if we should hide
function PopupWindow_hideIfNotClicked(e) {
    if (this.autoHideEnabled && !this.isClicked(e)) {
        this.hidePopup();
        }
    }
// Call this to make the DIV disable automatically when mouse is clicked outside it
function PopupWindow_autoHide() {
    this.autoHideEnabled = true;
    }
// This global function checks all PopupWindow objects onmouseup to see if they should be hidden
function PopupWindow_hidePopupWindows(e) {
    for (var i=0; i<popupWindowObjects.length; i++) {
        if (popupWindowObjects[i] != null) {
            var p = popupWindowObjects[i];
            p.hideIfNotClicked(e);
            }
        }
    }
// Run this immediately to attach the event listener
function PopupWindow_attachListener() {
    if (document.layers) {
        document.captureEvents(Event.MOUSEUP);
        }
    window.popupWindowOldEventListener = document.onmouseup;
    if (window.popupWindowOldEventListener != null) {
        document.onmouseup = new Function("window.popupWindowOldEventListener(); PopupWindow_hidePopupWindows();");
        }
    else {
        document.onmouseup = PopupWindow_hidePopupWindows;
        }
    }
// CONSTRUCTOR for the PopupWindow object
// Pass it a DIV name to use a DHTML popup, otherwise will default to window popup
function PopupWindow() {
    if (!window.popupWindowIndex) { window.popupWindowIndex = 0; }
    if (!window.popupWindowObjects) { window.popupWindowObjects = new Array(); }
    if (!window.listenerAttached) {
        window.listenerAttached = true;
        PopupWindow_attachListener();
        }
    this.index = popupWindowIndex++;
    popupWindowObjects[this.index] = this;
    this.divName = null;
    this.popupWindow = null;
    this.width=0;
    this.height=0;
    this.populated = false;
    this.visible = false;
    this.autoHideEnabled = false;
    
    this.contents = "";
    this.url="";
    this.windowProperties="toolbar=no,location=no,status=no,menubar=no,scrollbars=auto,resizable,alwaysRaised,dependent,titlebar=no";
    if (arguments.length>0) {
        this.type="DIV";
        this.divName = arguments[0];
        }
    else {
        this.type="WINDOW";
        }
    this.use_gebi = false;
    this.use_css = false;
    this.use_layers = false;
    if (document.getElementById) { this.use_gebi = true; }
    else if (document.all) { this.use_css = true; }
    else if (document.layers) { this.use_layers = true; }
    else { this.type = "WINDOW"; }
    this.offsetX = 0;
    this.offsetY = 0;
    // Method mappings
    this.getXYPosition = PopupWindow_getXYPosition;
    this.populate = PopupWindow_populate;
    this.setUrl = PopupWindow_setUrl;
    this.setWindowProperties = PopupWindow_setWindowProperties;
    this.refresh = PopupWindow_refresh;
    this.showPopup = PopupWindow_showPopup;
    this.hidePopup = PopupWindow_hidePopup;
    this.setSize = PopupWindow_setSize;
    this.isClicked = PopupWindow_isClicked;
    this.autoHide = PopupWindow_autoHide;
    this.hideIfNotClicked = PopupWindow_hideIfNotClicked;
    }

// CONSTRUCTOR for the CalendarPopup Object
function CalendarPopup() {
    var c;
    if (arguments.length > 0) {
        c = new PopupWindow(arguments[0]);
    } else {
        c = new PopupWindow();
        c.setSize(150, 175);
    }
    
    /* begin: hack */
    c.homepage = ('undefined' !== typeof arguments[3]);
    /* end: hack */
    
//    c.offsetX = ('undefined' !== typeof arguments[1] && arguments[1] > 0)? arguments[1] : -152;
    c.offsetX = -152;
    c.offsetY = 25;
    c.autoHide();
    // Calendar-specific properties
    c.monthNames = new Array('January','February','March','April','May','June','July','August','September','October','November','December');
    c.monthAbbreviations = new Array('Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec');
//    c.dayHeaders = new Array('S','M','T','W','T','F','S');
    c.dayHeaders = new Array('Su','Mo','Tu','We','Th','Fr','Sa');
    c.returnFunction = 'CP_tmpReturnFunction';
    c.returnMonthFunction = 'CP_tmpReturnMonthFunction';
    c.returnQuarterFunction = 'CP_tmpReturnQuarterFunction';
    c.returnYearFunction = 'CP_tmpReturnYearFunction';
    c.weekStartDay = 0;
    c.isShowYearNavigation = false;
    c.displayType = 'date';
    c.disabledWeekDays = new Object();
    c.disabledDatesExpression = '';
    c.yearSelectStartOffset = 2;
    c.currentDate = null;
    c.todayText='Today';
    c.cssPrefix='';
    c.isShowNavigationDropdowns=false;
    c.isShowYearNavigationInput=false;
    window.CP_calendarObject = null;
    window.CP_targetInput = null;
    window.CP_dateFormat = 'MM/dd/yyyy';
    // Method mappings
    c.copyMonthNamesToWindow = CP_copyMonthNamesToWindow;
    c.setReturnFunction = CP_setReturnFunction;
    c.setReturnMonthFunction = CP_setReturnMonthFunction;
    c.setReturnQuarterFunction = CP_setReturnQuarterFunction;
    c.setReturnYearFunction = CP_setReturnYearFunction;
    c.setMonthNames = CP_setMonthNames;
    c.setMonthAbbreviations = CP_setMonthAbbreviations;
    c.setDayHeaders = CP_setDayHeaders;
    c.setWeekStartDay = CP_setWeekStartDay;
    c.setDisplayType = CP_setDisplayType;
    c.setDisabledWeekDays = CP_setDisabledWeekDays;
    c.addDisabledDates = CP_addDisabledDates;
    c.setYearSelectStartOffset = CP_setYearSelectStartOffset;
    c.setTodayText = CP_setTodayText;
    c.showYearNavigation = CP_showYearNavigation;
    c.showCalendar = CP_showCalendar;
    c.hideCalendar = CP_hideCalendar;
    c.getStyles = getCalendarStyles;
    c.refreshCalendar = CP_refreshCalendar;
    c.getCalendar = CP_getCalendar;
    c.select = CP_select;
    c.setCssPrefix = CP_setCssPrefix;
    c.showNavigationDropdowns = CP_showNavigationDropdowns;
    c.showYearNavigationInput = CP_showYearNavigationInput;
    c.copyMonthNamesToWindow();
    // Return the object
    return c;
    }
function CP_copyMonthNamesToWindow() {
    // Copy these values over to the date.js 
    if (typeof(window.MONTH_NAMES)!="undefined" && window.MONTH_NAMES!=null) {
        window.MONTH_NAMES = new Array();
        for (var i=0; i<this.monthNames.length; i++) {
            window.MONTH_NAMES[window.MONTH_NAMES.length] = this.monthNames[i];
        }
        for (var i=0; i<this.monthAbbreviations.length; i++) {
            window.MONTH_NAMES[window.MONTH_NAMES.length] = this.monthAbbreviations[i];
        }
    }
}
// Temporary default functions to be called when items clicked, so no error is thrown
function CP_tmpReturnFunction(y,m,d) { 
    if (window.CP_targetInput!=null) {
        var dt = new Date(y,m-1,d,0,0,0);
        if (window.CP_calendarObject!=null) { window.CP_calendarObject.copyMonthNamesToWindow(); }
        window.CP_targetInput.value = formatDate(dt,window.CP_dateFormat);
        }
    else {
        alert('Use setReturnFunction() to define which function will get the clicked results!'); 
        }
    }
function CP_tmpReturnMonthFunction(y,m) { 
    alert('Use setReturnMonthFunction() to define which function will get the clicked results!\nYou clicked: year='+y+' , month='+m); 
    }
function CP_tmpReturnQuarterFunction(y,q) { 
    alert('Use setReturnQuarterFunction() to define which function will get the clicked results!\nYou clicked: year='+y+' , quarter='+q); 
    }
function CP_tmpReturnYearFunction(y) { 
    alert('Use setReturnYearFunction() to define which function will get the clicked results!\nYou clicked: year='+y); 
    }

// Set the name of the functions to call to get the clicked item
function CP_setReturnFunction(name) { this.returnFunction = name; }
function CP_setReturnMonthFunction(name) { this.returnMonthFunction = name; }
function CP_setReturnQuarterFunction(name) { this.returnQuarterFunction = name; }
function CP_setReturnYearFunction(name) { this.returnYearFunction = name; }

// Over-ride the built-in month names
function CP_setMonthNames() {
    for (var i=0; i<arguments.length; i++) { this.monthNames[i] = arguments[i]; }
    this.copyMonthNamesToWindow();
    }

// Over-ride the built-in month abbreviations
function CP_setMonthAbbreviations() {
    for (var i=0; i<arguments.length; i++) { this.monthAbbreviations[i] = arguments[i]; }
    this.copyMonthNamesToWindow();
    }

// Over-ride the built-in column headers for each day
function CP_setDayHeaders() {
    for (var i=0; i<arguments.length; i++) { this.dayHeaders[i] = arguments[i]; }
    }

// Set the day of the week (0-7) that the calendar display starts on
// This is for countries other than the US whose calendar displays start on Monday(1), for example
function CP_setWeekStartDay(day) { this.weekStartDay = day; }

// Show next/last year navigation links
function CP_showYearNavigation() { this.isShowYearNavigation = (arguments.length>0)?arguments[0]:true; }

// Which type of calendar to display
function CP_setDisplayType(type) {
    if (type!="date"&&type!="week-end"&&type!="month"&&type!="quarter"&&type!="year") { alert("Invalid display type! Must be one of: date,week-end,month,quarter,year"); return false; }
    this.displayType=type;
    }

// How many years back to start by default for year display
function CP_setYearSelectStartOffset(num) { this.yearSelectStartOffset=num; }

// Set which weekdays should not be clickable
function CP_setDisabledWeekDays() {
    this.disabledWeekDays = new Object();
    for (var i=0; i<arguments.length; i++) { this.disabledWeekDays[arguments[i]] = true; }
    }
    
// Disable individual dates or ranges
// Builds an internal logical test which is run via eval() for efficiency
function CP_addDisabledDates(start, end) {
    if (arguments.length==1) { end=start; }
    if (start==null && end==null) { return; }
    if (this.disabledDatesExpression!="") { this.disabledDatesExpression+= "||"; }
    if (start!=null) { start = parseDate(start); start=""+start.getFullYear()+LZ(start.getMonth()+1)+LZ(start.getDate());}
    if (end!=null) { end=parseDate(end); end=""+end.getFullYear()+LZ(end.getMonth()+1)+LZ(end.getDate());}
    if (start==null) { this.disabledDatesExpression+="(ds<="+end+")"; }
    else if (end  ==null) { this.disabledDatesExpression+="(ds>="+start+")"; }
    else { this.disabledDatesExpression+="(ds>="+start+"&&ds<="+end+")"; }
    }
    
// Set the text to use for the "Today" link
function CP_setTodayText(text) {
    this.todayText = text;
    }

// Set the prefix to be added to all CSS classes when writing output
function CP_setCssPrefix(val) { 
    this.cssPrefix = val; 
    }

// Show the navigation as an dropdowns that can be manually changed
function CP_showNavigationDropdowns() { this.isShowNavigationDropdowns = (arguments.length>0)?arguments[0]:true; }

// Show the year navigation as an input box that can be manually changed
function CP_showYearNavigationInput() { this.isShowYearNavigationInput = (arguments.length>0)?arguments[0]:true; }

// Hide a calendar object
function CP_hideCalendar() {
    if (arguments.length > 0) { window.popupWindowObjects[arguments[0]].hidePopup(); }
    else { this.hidePopup(); }
    }

// Refresh the contents of the calendar display
function CP_refreshCalendar(index) {
    var calObject = window.popupWindowObjects[index];
    if (arguments.length>1) { 
        calObject.populate(calObject.getCalendar(arguments[1],arguments[2],arguments[3],arguments[4],arguments[5]));
    } else {
        calObject.populate(calObject.getCalendar());
    }
    calObject.refresh();
    
    // Drop shadow must be refreshed whenver the user changes months
    CP_addDropShadow();
    
    // IE6 iframe hack must be reapplied as well
    CP_ieFix();
}

// Populate the calendar and display it
function CP_showCalendar(anchorname) {
    if (arguments.length>1) {
        if (arguments[1]==null||arguments[1]=="") {
            this.currentDate=new Date();
            }
        else {
            this.currentDate=new Date(parseDate(arguments[1]));
            }
        }
    this.populate(this.getCalendar());
    this.showPopup(anchorname);
    
    // Add drop shadow around the calendar
    CP_addDropShadow();
    
    // hide  form fields underneath the calendar in IE
    CP_ieFix();
}

/**
 * Apply iframe fix to the pop-up div to hide form elements from showing through
 * It's part of TRAVELBUG.dateSelect so it can have access to those private members
 */
function CP_ieFix() {
    TRAVELBUG.dateSelect.calFixIE();
}

/**
 * This method was added by Andrew Hedges, andrew.hedges@vianet.travel, 2008-04-08
 * It adds a drop shadow DIV around the current calendar
 * Requires prototype.js
 */
function CP_addDropShadow() {
    var calElement, calNode, shadowNode;
    calElement = $$('div#calDiv')[0].immediateDescendants()[0];
    calNode    = calElement.cloneNode(true);
    shadowNode = $(document.createElement('DIV'));
    shadowNode.addClassName('calContainer');
    shadowNode.appendChild(calNode);
    calElement.parentNode.replaceChild(shadowNode, calElement);
}

// Simple method to interface popup calendar with a text-entry box
function CP_select(inputobj, linkname, format) {
    var selectedDate=(arguments.length>3)?arguments[3]:null;
    if (!window.getDateFromFormat) {
        alert("calendar.select: To use this method you must also include 'date.js' for date formatting");
        return;
        }
    if (this.displayType!="date"&&this.displayType!="week-end") {
        alert("calendar.select: This function can only be used with displayType 'date' or 'week-end'");
        return;
        }
    if (inputobj.type!="text" && inputobj.type!="hidden" && inputobj.type!="textarea") { 
        alert("calendar.select: Input object passed is not a valid form input object"); 
        window.CP_targetInput=null;
        return;
        }
    if (inputobj.disabled) { return; } // Can't use calendar input on disabled form input!
    window.CP_targetInput = inputobj;
    window.CP_calendarObject = this;
    this.currentDate=null;
    var time=0;
    if (selectedDate!=null) {
        time = getDateFromFormat(selectedDate,format)
        }
    else if (inputobj.value!="") {
        time = getDateFromFormat(inputobj.value,format);
        }
    if (selectedDate!=null || inputobj.value!="") {
        if (time==0) { this.currentDate=null; }
        else { this.currentDate=new Date(time); }
        }
    window.CP_dateFormat = format;
    this.showCalendar(linkname);
    }
    
// Get style block needed to display the calendar correctly
function getCalendarStyles() {
    var result = "";
    var p = "";
    if (this!=null && typeof(this.cssPrefix)!="undefined" && this.cssPrefix!=null && this.cssPrefix!="") { p=this.cssPrefix; }
    result += "<STYLE>\n";
    result += "."+p+"cpYearNavigation,."+p+"cpMonthNavigation { background-color:#C0C0C0; text-align:center; vertical-align:center; text-decoration:none; color:#000000; font-weight:bold; }\n";
    result += "."+p+"cpDayColumnHeader, ."+p+"cpYearNavigation,."+p+"cpMonthNavigation,."+p+"cpCurrentMonthDate,."+p+"cpCurrentMonthDateDisabled,."+p+"cpOtherMonthDate,."+p+"cpOtherMonthDateDisabled,."+p+"cpCurrentDate,."+p+"cpCurrentDateDisabled,."+p+"cpTodayText,."+p+"cpTodayTextDisabled,."+p+"cpText { font-family:arial; font-size:8pt; }\n";
    result += "TD."+p+"cpDayColumnHeader { text-align:right; border:solid thin #C0C0C0;border-width:0px 0px 1px 0px; }\n";
    result += "."+p+"cpCurrentMonthDate, ."+p+"cpOtherMonthDate, ."+p+"cpCurrentDate  { text-align:right; text-decoration:none; }\n";
    result += "."+p+"cpCurrentMonthDateDisabled, ."+p+"cpOtherMonthDateDisabled, ."+p+"cpCurrentDateDisabled { color:#D0D0D0; text-align:right; text-decoration:line-through; }\n";
    result += "."+p+"cpCurrentMonthDate, .cpCurrentDate { color:#000000; }\n";
    result += "."+p+"cpOtherMonthDate { color:#808080; }\n";
    result += "TD."+p+"cpCurrentDate { color:white; background-color: #C0C0C0; border-width:1px; border:solid thin #800000; }\n";
    result += "TD."+p+"cpCurrentDateDisabled { border-width:1px; border:solid thin #FFAAAA; }\n";
    result += "TD."+p+"cpTodayText, TD."+p+"cpTodayTextDisabled { border:solid thin #C0C0C0; border-width:1px 0px 0px 0px;}\n";
    result += "A."+p+"cpTodayText, SPAN."+p+"cpTodayTextDisabled { height:20px; }\n";
    result += "A."+p+"cpTodayText { color:black; }\n";
    result += "."+p+"cpTodayTextDisabled { color:#D0D0D0; }\n";
    result += "."+p+"cpBorder { border:solid thin #808080; }\n";
    result += "</STYLE>\n";
    return result;
    }

// Return a string containing all the calendar code to be displayed
function CP_getCalendar() {
    var now = new Date();
    // Reference to window
    if (this.type == "WINDOW") { var windowref = "window.opener."; }
    else { var windowref = ""; }
    var result = "";
    // If POPUP, write entire HTML document
    if (this.type == "WINDOW") {
        result += "<HTML><HEAD><TITLE>Calendar</TITLE>"+this.getStyles()+"</HEAD><BODY MARGINWIDTH=0 MARGINHEIGHT=0 TOPMARGIN=0 RIGHTMARGIN=0 LEFTMARGIN=0>\n";
        result += '<CENTER><TABLE WIDTH=100% BORDER=0 BORDERWIDTH=0 CELLSPACING=0 CELLPADDING=0>\n';
        }
    else {
        result += '<TABLE CLASS="'+this.cssPrefix+'cpBorder" width=\"174\" border="0" CELLSPACING=0 cellpadding="0">\n';
        result += '<TR><TD ALIGN=CENTER>\n';
        result += '<CENTER>\n';
        }
    // Code for DATE display (default)
    // -------------------------------
    if (this.displayType=="date" || this.displayType=="week-end") {
        if (this.currentDate==null) { this.currentDate = now; }
        if (arguments.length > 0) { var month = arguments[0]; }
            else { var month = this.currentDate.getMonth()+1; }
        if (arguments.length > 1 && arguments[1]>0 && arguments[1]-0==arguments[1]) { var year = arguments[1]; }
            else { var year = this.currentDate.getFullYear(); }
        var daysinmonth= new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);
        if ( ( (year%4 == 0)&&(year%100 != 0) ) || (year%400 == 0) ) {
            daysinmonth[2] = 29;
            }
        var current_month = new Date(year,month-1,1);
        var display_year = year;
        var display_month = month;
        var display_date = 1;
        var weekday= current_month.getDay();
        var offset = 0;
        
        offset = (weekday >= this.weekStartDay) ? weekday-this.weekStartDay : 7-this.weekStartDay+weekday ;
        if (offset > 0) {
            display_month--;
            if (display_month < 1) { display_month = 12; display_year--; }
            display_date = daysinmonth[display_month]-offset+1;
            }
        var next_month = month+1;
        var next_month_year = year;
        if (next_month > 12) { next_month=1; next_month_year++; }
        var last_month = month-1;
        var last_month_year = year;
        if (last_month < 1) { last_month=12; last_month_year--; }
        var date_class;
        if (this.type!="WINDOW") {
            result += "<TABLE width=\"174\" BORDER=0 BORDERWIDTH=0 CELLSPACING=0 CELLPADDING=0>";
            }
        result += '<TR>\n';
        var refresh = windowref+'CP_refreshCalendar';
        var refreshLink = 'javascript:' + refresh;
		
        if (this.isShowNavigationDropdowns) {
            result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="78" COLSPAN="3"><select CLASS="'+this.cssPrefix+'cpMonthNavigation" name="cpMonth" onChange="'+refresh+'('+this.index+',this.options[this.selectedIndex].value-0,'+(year-0)+');">';
            for( var monthCounter=1; monthCounter<=12; monthCounter++ ) {
                var selected = (monthCounter==month) ? 'SELECTED' : '';
                result += '<option value="'+monthCounter+'" '+selected+'>'+this.monthNames[monthCounter-1]+'</option>';
                }
            result += '</select></TD>';
            result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="10">&nbsp;</TD>';

            result += '<TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="56" COLSPAN="3"><select CLASS="'+this.cssPrefix+'cpYearNavigation" name="cpYear" onChange="'+refresh+'('+this.index+','+month+',this.options[this.selectedIndex].value-0);">';
            for( var yearCounter=year-this.yearSelectStartOffset; yearCounter<=year+this.yearSelectStartOffset; yearCounter++ ) {
                var selected = (yearCounter==year) ? 'SELECTED' : '';
                result += '<option value="'+yearCounter+'" '+selected+'>'+yearCounter+'</option>';
                }
            result += '</select></TD>';
            }
        else {
            if (this.isShowYearNavigation) {
                result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="10"><A CLASS="'+this.cssPrefix+'cpMonthNavigation" HREF="'+refreshLink+'('+this.index+','+last_month+','+last_month_year+');">&lt;</A></TD>';
                result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="58"><SPAN CLASS="'+this.cssPrefix+'cpMonthNavigation">'+this.monthNames[month-1]+'</SPAN></TD>';
                result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="10"><A CLASS="'+this.cssPrefix+'cpMonthNavigation" HREF="'+refreshLink+'('+this.index+','+next_month+','+next_month_year+');">&gt;</A></TD>';
                result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="10">&nbsp;</TD>';

                result += '<TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="10"><A CLASS="'+this.cssPrefix+'cpYearNavigation" HREF="'+refreshLink+'('+this.index+','+month+','+(year-1)+');">&lt;</A></TD>';
                if (this.isShowYearNavigationInput) {
                    result += '<TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="36"><INPUT NAME="cpYear" CLASS="'+this.cssPrefix+'cpYearNavigation" SIZE="4" MAXLENGTH="4" VALUE="'+year+'" onBlur="'+refresh+'('+this.index+','+month+',this.value-0);"></TD>';
                    }
                else {
                    result += '<TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="36"><SPAN CLASS="'+this.cssPrefix+'cpYearNavigation">'+year+'</SPAN></TD>';
                    }
                result += '<TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="10"><A CLASS="'+this.cssPrefix+'cpYearNavigation" HREF="'+refreshLink+'('+this.index+','+month+','+(year+1)+');">&gt;</A></TD>';
                }
            else {
                actual_current_month = now.getMonth() + 1; // Add 1 because the javascript date object returns 0 for Jan, 1 for Feb, ...etc
                
                // Hide the back arrow if the month on the popup is
                // the current month we are in now
                hide_back_arrow = (month == actual_current_month);
                if (!hide_back_arrow) {
                    result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="22"><A CLASS="'+this.cssPrefix+'cpMonthNavigation" HREF="'+refreshLink+'('+this.index+','+last_month+','+last_month_year+');"><img src="images/popcal-arrow-prev.gif" alt="Previous month" /></A></TD>\n';
                    }
                    
                result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="100%"><SPAN CLASS="'+this.cssPrefix+'cpMonthNavigation">'+this.monthNames[month-1]+' '+year+'</SPAN></TD>\n';
                
                // Hide the forward arrow if the month on the popup is
                // one month less than the current month but in the next year
                // or if the month on the popup is December and the current month is January
                hide_forward_arrow = (month == actual_current_month - 1) || (month == 12 && actual_current_month == 1);
                if (!hide_forward_arrow) {
                    result += '<TD CLASS="'+this.cssPrefix+'cpMonthNavigation" WIDTH="22"><A CLASS="'+this.cssPrefix+'cpMonthNavigation" HREF="'+refreshLink+'('+this.index+','+next_month+','+next_month_year+');"><img src="images/popcal-arrow-next.gif" alt="Next month" /></A></TD>\n';
                    }
                }
            }
        result += '</TR></TABLE>\n';
        result += '<TABLE WIDTH=120 BORDER=0 CELLSPACING=0 cellpadding="0" ALIGN=CENTER>\n';
        result += '<TR>\n';
        for (var j=0; j<7; j++) {

            result += '<TD CLASS="'+this.cssPrefix+'cpDayColumnHeader" WIDTH="14%"><SPAN CLASS="'+this.cssPrefix+'cpDayColumnHeader">'+this.dayHeaders[(this.weekStartDay+j)%7]+'</TD>\n';
            }
        result += '</TR>\n';
        for (var row=1; row<=6; row++) {
            result += '<TR>\n';
            for (var col=1; col<=7; col++) {
                var disabled=false;
                if (this.disabledDatesExpression!="") {
                    var ds=""+display_year+LZ(display_month)+LZ(display_date);
                    eval("disabled=("+this.disabledDatesExpression+")");
                    }
                var dateClass = "";				
                if ((display_month == this.currentDate.getMonth()+1) && (display_date==this.currentDate.getDate()) && (display_year==this.currentDate.getFullYear())) {
                    dateClass = "cpCurrentDate";
                    }
                else if (display_month == month) {
                    dateClass = "cpCurrentMonthDate";
                    }
                else {
                    dateClass = "cpOtherMonthDate";
                    }
                if (disabled || this.disabledWeekDays[col-1]) {
                    result += '    <TD CLASS="'+this.cssPrefix+dateClass+'"><SPAN CLASS="'+this.cssPrefix+dateClass+'Disabled">'+display_date+'</SPAN></TD>\n';
                    }
                else {
                    var selected_date = display_date;
                    var selected_month = display_month;
                    var selected_year = display_year;
                    if (this.displayType=="week-end") {
                        var d = new Date(selected_year,selected_month-1,selected_date,0,0,0,0);
                        d.setDate(d.getDate() + (7-col));
                        selected_year = d.getYear();
                        if (selected_year < 1000) { selected_year += 1900; }
                        selected_month = d.getMonth()+1;
                        selected_date = d.getDate();
                        }
                    result += '    <TD CLASS="'+this.cssPrefix+dateClass+'"><A HREF="javascript:'+windowref+this.returnFunction+'('+selected_year+','+selected_month+','+selected_date+');'+windowref+'CP_hideCalendar(\''+this.index+'\');" CLASS="'+this.cssPrefix+dateClass+'">'+display_date+'</A></TD>\n';
                    }
                display_date++;
                if (display_date > daysinmonth[display_month]) {
                    display_date=1;
                    display_month++;
                    }
                if (display_month > 12) {
                    display_month=1;
                    display_year++;
                    }
                }
            result += '</TR>';
            }
        var current_weekday = now.getDay() - this.weekStartDay;
        if (current_weekday < 0) {
            current_weekday += 7;
            }
        result += '<TR>\n';
        result += '    <TD COLSPAN=7 ALIGN=CENTER CLASS="'+this.cssPrefix+'cpTodayText">\n';
        if (this.disabledDatesExpression!="") {
            var ds=""+now.getFullYear()+LZ(now.getMonth()+1)+LZ(now.getDate());
            eval("disabled=("+this.disabledDatesExpression+")");
            }
        if (disabled || this.disabledWeekDays[current_weekday+1]) {
            result += '        <SPAN CLASS="'+this.cssPrefix+'cpTodayTextDisabled">'+this.todayText+'</SPAN>\n';
            }
        else {
            result += '        <A CLASS="'+this.cssPrefix+'cpTodayText" HREF="javascript:'+windowref+this.returnFunction+'(\''+now.getFullYear()+'\',\''+(now.getMonth()+1)+'\',\''+now.getDate()+'\');'+windowref+'CP_hideCalendar(\''+this.index+'\');">'+this.todayText+'</A>\n';
            }
        result += '        <BR>\n';
        result += '    </TD></TR></TABLE></CENTER></TD></TR></TABLE>\n';
    }

    // Code common for MONTH, QUARTER, YEAR
    // ------------------------------------
    if (this.displayType=="month" || this.displayType=="quarter" || this.displayType=="year") {
        if (arguments.length > 0) { var year = arguments[0]; }
        else { 
            if (this.displayType=="year") {    var year = now.getFullYear()-this.yearSelectStartOffset; }
            else { var year = now.getFullYear(); }
            }
        if (this.displayType!="year" && this.isShowYearNavigation) {
            result += "<TABLE width=\"174\" BORDER=0 BORDERWIDTH=0 CELLSPACING=0 CELLPADDING=0>";
            result += '<TR>\n';
            result += '    <TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="22"><A CLASS="'+this.cssPrefix+'cpYearNavigation" HREF="javascript:'+windowref+'CP_refreshCalendar('+this.index+','+(year-1)+');">&lt;&lt;</A></TD>\n';
            result += '    <TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="100%">'+year+'</TD>\n';
            result += '    <TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="22"><A CLASS="'+this.cssPrefix+'cpYearNavigation" HREF="javascript:'+windowref+'CP_refreshCalendar('+this.index+','+(year+1)+');">&gt;&gt;</A></TD>\n';
            result += '</TR></TABLE>\n';
            }
        }
        
    // Code for MONTH display 
    // ----------------------
    if (this.displayType=="month") {
        // If POPUP, write entire HTML document
        result += '<TABLE WIDTH=120 BORDER=0 cellspacing="0" CELLPADDING=0 ALIGN=CENTER>\n';
        for (var i=0; i<4; i++) {
            result += '<TR>';
            for (var j=0; j<3; j++) {
                var monthindex = ((i*3)+j);
                result += '<TD WIDTH=33% ALIGN=CENTER><A CLASS="'+this.cssPrefix+'cpText" HREF="javascript:'+windowref+this.returnMonthFunction+'('+year+','+(monthindex+1)+');'+windowref+'CP_hideCalendar(\''+this.index+'\');" CLASS="'+date_class+'">'+this.monthAbbreviations[monthindex]+'</A></TD>';
                }
            result += '</TR>';
            }
        result += '</TABLE></CENTER></TD></TR></TABLE>\n';
        }
    
    // Code for QUARTER display
    // ------------------------
    if (this.displayType=="quarter") {
        result += '<BR><TABLE WIDTH=120 border="0" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER>\n';
        for (var i=0; i<2; i++) {
            result += '<TR>';
            for (var j=0; j<2; j++) {
                var quarter = ((i*2)+j+1);
                result += '<TD WIDTH=50% ALIGN=CENTER><BR><A CLASS="'+this.cssPrefix+'cpText" HREF="javascript:'+windowref+this.returnQuarterFunction+'('+year+','+quarter+');'+windowref+'CP_hideCalendar(\''+this.index+'\');" CLASS="'+date_class+'">Q'+quarter+'</A><BR><BR></TD>';
                }
            result += '</TR>';
            }
        result += '</TABLE></CENTER></TD></TR></TABLE>\n';
        }

    // Code for YEAR display
    // ---------------------
    if (this.displayType=="year") {
        var yearColumnSize = 4;
        result += "<TABLE width=\"174\" BORDER=0 BORDERWIDTH=0 CELLSPACING=0 CELLPADDING=0>";
        result += '<TR>\n';
        result += '    <TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="50%"><A CLASS="'+this.cssPrefix+'cpYearNavigation" HREF="javascript:'+windowref+'CP_refreshCalendar('+this.index+','+(year-(yearColumnSize*2))+');">&lt;&lt;</A></TD>\n';
        result += '    <TD CLASS="'+this.cssPrefix+'cpYearNavigation" WIDTH="50%"><A CLASS="'+this.cssPrefix+'cpYearNavigation" HREF="javascript:'+windowref+'CP_refreshCalendar('+this.index+','+(year+(yearColumnSize*2))+');">&gt;&gt;</A></TD>\n';
        result += '</TR></TABLE>\n';
        result += '<TABLE WIDTH=120 BORDER=0 cellspacing="0" CELLPADDING=0 ALIGN=CENTER>\n';
        for (var i=0; i<yearColumnSize; i++) {
            for (var j=0; j<2; j++) {
                var currentyear = year+(j*yearColumnSize)+i;
                result += '<TD WIDTH=50% ALIGN=CENTER><A CLASS="'+this.cssPrefix+'cpText" HREF="javascript:'+windowref+this.returnYearFunction+'('+currentyear+');'+windowref+'CP_hideCalendar(\''+this.index+'\');" CLASS="'+date_class+'">'+currentyear+'</A></TD>';
                }
            result += '</TR>';
            }
        result += '</TABLE></CENTER></TD></TR></TABLE>\n';
        }
    // Common
    if (this.type == "WINDOW") {
        result += "</BODY></HTML>\n";
        }
    return result;
    }