//*********************** ES COPYRIGHT START  *********************************
// @copyright(disclaimer)
// Licensed Materials - Property of IBM
// IBM OmniFind Enterprise Edition Version 8.5 (Program Number:  5724-L31)
// (c ) Copyright IBM Corp. 2003, 2008. All Rights Reserved.
//
// US Government Users Restricted Rights
// Use, duplication or disclosure restricted by GSA ADP Schedule
// Contract with IBM Corp.
//
// DISCLAIMER OF WARRANTIES :
//
// Permission is granted to copy and modify this  Sample code, and to
// distribute modified versions provided that both the copyright
// notice,- and this permission notice and warranty disclaimer appear
// in all copies and modified versions.
//
// THIS SAMPLE CODE IS LICENSED TO YOU AS-IS.
// IBM  AND ITS SUPPLIERS AND LICENSORS  DISCLAIM
// ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, IN SUCH SAMPLE CODE,
// INCLUDING THE WARRANTY OF NON-INFRINGEMENT AND THE IMPLIED WARRANTIES
// OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
// WILL IBM OR ITS LICENSORS OR SUPPLIERS BE LIABLE FOR ANY DAMAGES ARISING
// OUT OF THE USE OF  OR INABILITY TO USE THE SAMPLE CODE, DISTRIBUTION OF
// THE SAMPLE CODE, OR COMBINATION OF THE SAMPLE CODE WITH ANY OTHER CODE.
// IN NO EVENT SHALL IBM OR ITS LICENSORS AND SUPPLIERS BE LIABLE FOR ANY
// LOST REVENUE, LOST PROFITS OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
// CONSEQUENTIAL,INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS
// OF THE THEORY OF LIABILITY,-, EVEN IF IBM OR ITS LICENSORS OR SUPPLIERS
// HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
//
// @endCopyright
//*********************** ES COPYRIGHT END  ***********************************

//var THE_DATE_FORMAT = "m/d/Y";
var THE_DATE_FORMAT = "Y/m/d";
var CALENDAR_HEADING = makeHTMLHeading();
var TODAYS_DATE = new Date();

var calendarTimeout = false;
var textElement = null;
var daysInMonthList = new Array(31,28,31,30,31,30,31,31,30,31,30,31);
var calendarDate = null;
var calendarSelectedCell = null;

function getCalendarFor(event, targetId) {
	//alert(FIRST_DAY_OF_WEEK);
	textElement = document.getElementById(targetId);
	var inputDate = new Date(textElement.value);
	if (isFinite(inputDate)) {
		//alert('Yes finite. y='+getFullYear(inputDate)+' m='+inputDate.getMonth()+' d='+inputDate.getDate());
		setCalendar(getFullYear(inputDate), inputDate.getMonth());
		var cellElement = document.getElementById('cell'+inputDate.getDate());
		if (cellElement) {
			cellElement.className = 'wpsPortletAccentArea';
			cellElement.isSelected = true;
			calendarSelectedCell = cellElement;
		}	
	} else {
		if (calendarDate == null) {
			setCalendar();
		}	
	}
	// Display popup
	var calendarObj = document.getElementById('PopUpCalendar');
	calendarObj.style.top = "-1000px";
	calendarObj.style.display = "block";
	var scrollTop = getDocumentElement().scrollTop;
	var scrollLeft = getDocumentElement().scrollLeft;
	var posY = event.clientY; 
	var posX = event.clientX; 
	if (isRTL()) {  
	    if (window.event) { //IE
	     	calendarObj.style.left = (posX - calendarObj.offsetWidth)+"px";
	    } else { 
	        calendarObj.style.left = (posX + scrollLeft - calendarObj.offsetWidth) + "px";
	    } 	
	} else {
	    calendarObj.style.left = eval(posX + scrollLeft)+"px";
	}
	calendarObj.style.top = eval(posY + scrollTop)+"px";
	var frame = document.getElementById("calendarIFrame");
	frame.style.top = calendarObj.style.top;
	frame.style.left = calendarObj.style.left;
	frame.style.width = calendarObj.offsetWidth;
	frame.style.height = calendarObj.offsetHeight;
	frame.style.display = "inline"; 
	// Set month in select
	var monthSelect = document.getElementById('calendarMonthSelect');
	monthSelect.selectedIndex = calendarDate.getMonth();
}

function switchMonth(month) {
	setCalendar(getFullYear(calendarDate), month);
}

function moveMonth(dir) {
	var monthSelectElement = document.getElementById('calendarMonthSelect');
	var year = getFullYear(calendarDate);
	var month;
	if (monthSelectElement != null) {
		if (dir.toLowerCase() == "back") {
			if (monthSelectElement.selectedIndex > 0) 
				monthSelectElement.selectedIndex--;
			else {				
				monthSelectElement.selectedIndex = 11;
				year--;
			}
		} else if (dir.toLowerCase() == "forward") {
			if (monthSelectElement.selectedIndex < 11)
				monthSelectElement.selectedIndex++;
			else {		
				monthSelectElement.selectedIndex = 0;
				year++;
			}
		} 
		month = monthSelectElement.selectedIndex;
	}
	setCalendar(year, month);
}

function moveYear(dir) {
	var curYear = getFullYear(calendarDate);
	if ((dir.toLowerCase() == "back")) {
		curYear--;
	} else if ((dir.toLowerCase() == "forward")) {
		curYear++;
	}
	setCalendar(curYear, calendarDate.getMonth());
}

function selectDay(selectedDay, cellElement) {
	if (calendarSelectedCell) {
		calendarSelectedCell.className = '';
		calendarSelectedCell.isSelected=false;
	}
	cellElement.className = 'wpsPortletAccentArea';
	cellElement.isSelected=true;
	calendarSelectedCell = cellElement;
	
	var year  = getFullYear(calendarDate);
	var month = calendarDate.getMonth();
	var day  = selectedDay;
	var dayInt = parseInt(day);
	calendarDate.setDate(dayInt);
	textElement.value = dateFormat(year, month, day);
	hideCalendar();
}

function setCalendar(year, month) {
	if (year == null) {
		year = getFullYear(TODAYS_DATE);
	}
	if (month == null) {
		month = TODAYS_DATE.getMonth();
	}
	if (month == 1) {
		daysInMonthList[1] = (isLeap(year)) ? 29 : 28;
	}
	if (calendarDate == null) {
	   calendarDate = new Date();
	}   
	calendarDate.setYear(year);
	calendarDate.setMonth(month);
	calendarDate.setDate(1);
	updateCalendarHTML();
}
function updateCalendarHTML() {
	// Set year
	document.getElementById('year').innerHTML = getFullYear(calendarDate);
	
	//Set monthDays
	var year  = getFullYear(calendarDate);
	var month = calendarDate.getMonth();
	var dayOfWeekNumber = calendarDate.getDay();
	var daysInMonth = daysInMonthList[month];
	var date = 1;
	var tableData="";
	for (var row = 0; row < 7; ++row) {
		if (date > daysInMonth) {
			break;
		}
		var rowdata = "";
		for (var col = 0; col < 7; ++col) {
		    var isEmptyCell = false;
			if (date > daysInMonth) {
			    isEmptyCell = true;
			} else if (row == 0) {
			    if (FIRST_DAY_OF_WEEK == 7) { //if Saturday is start of calendar
			        if (dayOfWeekNumber != 6) { //if not Saturday
			           if (col < (dayOfWeekNumber + 1)) {
			               isEmptyCell = true;
			           }
			        }        
			    } else if (FIRST_DAY_OF_WEEK == 2) { //if Monday is start of calendar
			        if (dayOfWeekNumber == 0) { //if Sunday
			            if (col < 6) { 
			               isEmptyCell = true;
				        } else if (col < (dayOfWeekNumber - FIRST_DAY_OF_WEEK + 1)) {
			               isEmptyCell = true;
			            }
			        } else if (col < (dayOfWeekNumber - FIRST_DAY_OF_WEEK + 1)) {
			            isEmptyCell = true;
			        }   
			    } else {      
			       if (col < (dayOfWeekNumber - FIRST_DAY_OF_WEEK + 1)) {
			           isEmptyCell = true;
			       }    
			    }  
			}
			if (isEmptyCell) {
				rowdata += makeCellHTML(year, month, 0);
			} else {
				rowdata += makeCellHTML(year, month, date);
				++date;
			}
		}
		tableData += "<tr align=\"center\">\n" + rowdata + "</tr>\n";
	}
	var tableStart = "<table border=\"1\" cellspacing=\"0\" width=\"100%\">";
	var tableEnd = "</table>";
	document.getElementById('monthDays').innerHTML = tableStart + CALENDAR_HEADING + tableData + tableEnd;
}
function makeHTMLHeading() {
   var heading = "<tr align=\"center\" class=\"wpsPortletToolbarButton\">";
   if (FIRST_DAY_OF_WEEK == 1)
      heading += "<td width=\"20\"><b>"+SUNDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK <= 2)
      heading += "<td width=\"20\"><b>"+MONDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK <= 3)
      heading += "<td width=\"20\"><b>"+TUESDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK <= 4)
      heading += "<td width=\"20\"><b>"+WEDNESDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK <= 5)
      heading += "<td width=\"20\"><b>"+THURSDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK <= 6)
      heading += "<td width=\"20\"><b>"+FRIDAY+"</b></td>";
   heading += "<td width=\"20\"><b>"+SATURDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK > 1)
      heading += "<td width=\"20\"><b>"+SUNDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK > 2)
      heading += "<td width=\"20\"><b>"+MONDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK > 3)
      heading += "<td width=\"20\"><b>"+TUESDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK > 4)
      heading += "<td width=\"20\"><b>"+WEDNESDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK > 5)
      heading += "<td width=\"20\"><b>"+THURSDAY+"</b></td>";
   if (FIRST_DAY_OF_WEEK == 7)
      heading += "<td width=\"20\"><b>"+FRIDAY+"</b></td>";
   heading += "</tr>";
   return heading;
}
function makeCellHTML(year, month, day) {
	var CELL_START = "<td width=\"20\" ";
	var CELL_END = "</span></td>\n";
	var EVENTS = "onMouseOver=\"this.className='wpsPortletAccentArea'\" onMouseOut=\"if(!this.isSelected) this.className=''\" onMouseUp=\"selectDay('"+day+"', this);\" ";
	var spanStyle = "";
	if (GetBrowserType() == 0) {
	   spanStyle = "style=\"cursor: hand\"";
	} else {
	   spanStyle = "style=\"cursor: default\"";
	}
	var HAND_CURSOR = "<span " + spanStyle + ">";
	var DEFAULT_CURSOR = "<span style=\"cursor: default\">";
	if (day == 0) {
		return CELL_START + ">" + DEFAULT_CURSOR + "&nbsp;" + CELL_END;
	} else {
	    var dayString = day+"";
		var cellValue;
		if ((TODAYS_DATE.getDate() == day) && (TODAYS_DATE.getMonth() == month) && (getFullYear(TODAYS_DATE) == year)) {
			cellValue = "<b>"+dayString+"</b>";
		} else {
		    cellValue = dayString;
		}
		return CELL_START + "id=\"cell"+dayString+"\" " + EVENTS + ">" + HAND_CURSOR + cellValue + CELL_END;
	}
}

function hideCalendar() {
	var calendarObj = document.getElementById('PopUpCalendar');
	calendarObj.style.display = "none";
	var frame = document.getElementById("calendarIFrame");
	frame.style.display = "none";
	calendarTimeout = false;
	textElement = null;
	var monthSelect = document.getElementById('calendarMonthSelect');
	monthSelect.selectedIndex = 0;
}

function isLeap(year) {
	if ((year%400==0)||((year%4==0)&&(year%100!=0))) {
		return true;
	} else {
		return false;
	}
}
  
function getFullYear(dateobj) {
    if (!dateobj) return "";
	var y = dateobj.getYear();
	if (GetBrowserType() != 0 || y < 2000) {
		return y + 1900;
	} else {
		return y;
	}
}

function dateFormat(year, month, day) {
	var crt = "";
	var str = "";
	var chars = THE_DATE_FORMAT.length;
	for (var i = 0; i < chars; ++i) {
		crt = THE_DATE_FORMAT.charAt(i);
		switch (crt) {
		  case "m": str += (month<9) ? ("0"+(++month)) : ++month; break;
		  case "Y": str += year; break;
		  case "y": str += year.substring(2); break;
		  case "d": str += ((THE_DATE_FORMAT.indexOf("m")!=-1)&&(day<10)) ? ("0"+day) : day; break;
		  default: str += crt;
		}
	}
	return decodeURIComponent(str);
}