// if two digit year input dates after this year considered 20 century.
var NUM_CENTYEAR = 30;
// is time input control required by default
var BUL_TIMECOMPONENT = false;
// are year scrolling buttons required by default
var BUL_YEARSCROLL = true;

var calendars = [];
var RE_NUM = /^\-?\d+$/;

function calendar1(obj_target) {

	// assing methods
	this.gen_date = cal_gen_date1;
	this.gen_time = cal_gen_time1;
	this.gen_tsmp = cal_gen_tsmp1;
	this.prs_date = cal_prs_date1;
	this.prs_time = cal_prs_time1;
	this.prs_tsmp = cal_prs_tsmp1;
	this.popup    = cal_popup1;

	// validate input parameters
	if (!obj_target)
		return;// cal_error("Error calling the calendar: no target control specified");
	if (obj_target.value == null)
		return cal_error("Error calling the calendar: parameter specified is not valid target control");
	this.target = obj_target;
	this.time_comp = BUL_TIMECOMPONENT;
	this.year_scroll = BUL_YEARSCROLL;
	
	// register in global collections
	this.id = calendars.length;
	calendars[this.id] = this;
}

function cal_popup1 (str_datetime) {
	this.dt_current = this.prs_tsmp(str_datetime ? str_datetime : this.target.value);
	//alert('test');
	if (!this.dt_current) return;
		
		//var root=document.location;
		//alert(str_datetime);
	var obj_calwindow = window.open(
		'/public/js/calendar.html?datetime=' + this.dt_current.valueOf()+ '&id=' + this.id,
		'Calendar', 'width=200,height='+(this.time_comp ? 215 : 190)+
		',status=no,resizable=no,top=200,left=200,dependent=yes,alwaysRaised=yes'
	);
	obj_calwindow.opener = window;
	obj_calwindow.focus();
}

// timestamp generating function
function cal_gen_tsmp1 (dt_datetime) {
	return(this.gen_date(dt_datetime) + ' ' + this.gen_time(dt_datetime));
}

// date generating function
function cal_gen_date1 (dt_datetime) {
//var ARR_MONTHS1 = ["Jan", "Feb", "Mar", "Apr", "May", "Jun","Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
var ARR_MONTHS1 = ["01", "02", "03", "04", "05", "06","07", "08", "09", "10", "11", "12"];
var month=ARR_MONTHS1[eval(dt_datetime.getMonth())]; //previous code in place of month=(dt_datetime.getMonth() < 9 ? '0' : '') +dt_datetime.getMonth() + 1
//	alert(month);
	return (
		(dt_datetime.getDate() < 10 ? '0' : '') + dt_datetime.getDate() + "-"
		+ (month) + "-"
		+ dt_datetime.getFullYear()
	);
}
// time generating function
function cal_gen_time1 (dt_datetime) {
	return (
		(dt_datetime.getHours() < 10 ? '0' : '') + dt_datetime.getHours() + ":"
		+ (dt_datetime.getMinutes() < 10 ? '0' : '') + (dt_datetime.getMinutes()) + ":"
		+ (dt_datetime.getSeconds() < 10 ? '0' : '') + (dt_datetime.getSeconds())
	);
}

// timestamp parsing function
function cal_prs_tsmp1 (str_datetime) {
	// if no parameter specified return current timestamp
   if (!str_datetime)
		return (new Date());

	// if positive integer treat as milliseconds from epoch
	if (RE_NUM.exec(str_datetime))
		return new Date(str_datetime);
		
  var arr_date=str_datetime.split('-');
  if(arr_date.length!=3)
	 {
	   str_datetime="";
	  this.target.value="";
		return new Date(str_datetime);
	 }
	// else treat as date in string format
//=====================================================================\\	 
//=====================================================================\\	 
	var arr_datetime = str_datetime.split(' ');
	return this.prs_time(arr_datetime[1], this.prs_date(arr_datetime[0]));
}

// date parsing function
function cal_prs_date1 (str_dateField) {
//=====================================================================\\	 
//=====================================================================\\	 
str_date=str_dateField.value;
//alert(str_date);
//if not str_date field is a value======\\
	if(!str_date)
		str_date = str_dateField;
//=====================================================================\\	 
//=====================================================================\\	 
if(str_dateField.value=="")
   return true;
var validmonth=false;
var Month=0;
//var ARR_MONTH = ["JAN", "FEB", "MAR", "APR", "MAY", "JUN","JUL", "AUG", "SEP", "OCT", "NOV", "DEC"];
var ARR_MONTH = ["01", "02", "03", "04", "05", "06","07", "08", "09", "10", "11", "12"];
	var arr_date = str_date.split('-');
	if(arr_date.length<3)
	 {
		str_dateField.value = '';
		str_dateField.focus();
	   alert("Invalid date format: '" + str_date + "'.\nFormat accepted is DD-MON-YYYY.");
	   return false;
     }
//=====================================================================\\	 
//=====================================================================\\	 
	var mon=arr_date[1];
	mon=mon.toUpperCase(mon);
    for(i=0;i<ARR_MONTH.length;i++)
	 {
	   if(mon==ARR_MONTH[i])
	   {
	     Month=i+1;
		 validmonth=true;
		 break;
	   }
	 }

//=====================================================================\\	 
//=====================================================================\\	 
	if (arr_date.length != 3)
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	 return cal_error ("Invalid date format: '" + str_date + "'.\nFormat accepted is DD-MON-YYYY.");
	}
	if (!arr_date[0]) 
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	  return cal_error ("Invalid date format: '" + str_date + "'.\nNo day of month value can be found.");
    }
	if (!RE_NUM.exec(arr_date[0]))
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	 return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\nAllowed values are unsigned integers.");
    }
	if (!arr_date[1]) 
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	return cal_error ("Invalid date format: '" + str_date + "'.\nNo month value can be found.");
    }
	if (validmonth==false)
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	 return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed values are month abbr..");
    }
	if (!arr_date[2])
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	 return cal_error ("Invalid date format: '" + str_date + "'.\nNo year value can be found.");
    }
	if (!RE_NUM.exec(arr_date[2]))
	{
	  str_dateField.value = '';
	  str_dateField.focus();
	  return cal_error ("Invalid year value: '" + arr_date[2] + "'.\nAllowed values are unsigned integers.");
    }
	var dt_date = new Date();
	dt_date.setDate(1);

	if (Month < 1 || Month > 12) return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed range is 01-12.");
	dt_date.setMonth(Month-1);
	 
	if (arr_date[2] < 100) arr_date[2] = Number(arr_date[2]) + (arr_date[2] < NUM_CENTYEAR ? 2000 : 1900);
	dt_date.setFullYear(arr_date[2]);

	var dt_numdays = new Date(arr_date[2], Month, 0);
	dt_date.setDate(arr_date[0]);
	if (dt_date.getMonth() != (Month-1)) return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\nAllowed range is 01-"+dt_numdays.getDate()+".");

	return (dt_date)
}

// time parsing function
function cal_prs_time1 (str_time, dt_date) {

	if (!dt_date) return null;
	var arr_time = String(str_time ? str_time : '').split(':');

	if (!arr_time[0]) dt_date.setHours(0);
	else if (RE_NUM.exec(arr_time[0])) 
		if (arr_time[0] < 24) dt_date.setHours(arr_time[0]);
		else return cal_error ("Invalid hours value: '" + arr_time[0] + "'.\nAllowed range is 00-23.");
	else return cal_error ("Invalid hours value: '" + arr_time[0] + "'.\nAllowed values are unsigned integers.");
	
	if (!arr_time[1]) dt_date.setMinutes(0);
	else if (RE_NUM.exec(arr_time[1]))
		if (arr_time[1] < 60) dt_date.setMinutes(arr_time[1]);
		else return cal_error ("Invalid minutes value: '" + arr_time[1] + "'.\nAllowed range is 00-59.");
	else return cal_error ("Invalid minutes value: '" + arr_time[1] + "'.\nAllowed values are unsigned integers.");

	if (!arr_time[2]) dt_date.setSeconds(0);
	else if (RE_NUM.exec(arr_time[2]))
		if (arr_time[2] < 60) dt_date.setSeconds(arr_time[2]);
		else return cal_error ("Invalid seconds value: '" + arr_time[2] + "'.\nAllowed range is 00-59.");
	else return cal_error ("Invalid seconds value: '" + arr_time[2] + "'.\nAllowed values are unsigned integers.");

	dt_date.setMilliseconds(0);
	return dt_date;
}

function cal_error (str_message) {
	alert (str_message);
	return null;
}

function cal_prs_date1del (str_dateField) {
//=====================================================================\\	 
//=====================================================================\\	 
str_date=str_dateField.value;
//alert(str_date);
//if not str_date field is a value======\\
	if(!str_date)
		str_date = str_dateField;
//=====================================================================\\	 
//=====================================================================\\	 
if(str_dateField.value=="")
   return true;
var validmonth=false;
var Month=0;
var ARR_MONTH = ["JAN", "FEB", "MAR", "APR", "MAY", "JUN","JUL", "AUG", "SEP", "OCT", "NOV", "DEC"];
	var arr_date = str_date.split('-');
	if(arr_date.length >3)
	 {
		str_dateField.value = '';
		str_dateField.focus();
	   alert("Invalid date format: '" + str_date + "'.\nFormat accepted is DD-MON-YYYY.");
	   return false;
     }
//=====================================================================\\	 
//=====================================================================\\	 
	//===========if date format is dd-mon-yyyy================================
	if(arr_date.length == 3)
	{
		//=====================================================================\\	 
			var mon=arr_date[1];
			mon=mon.toUpperCase(mon);
			for(i=0;i<ARR_MONTH.length;i++)
			 {
			   if(mon==ARR_MONTH[i])
			   {
				 Month=i+1;
				 validmonth=true;
				 break;
			   }
			 }
		
		//=====================================================================\\
		if (arr_date.length < 3)
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		 return cal_error ("Invalid date format: '" + str_date + "'.\nFormat accepted is DD-MON-YYYY.");
		}
		if (!arr_date[0]) 
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		  return cal_error ("Invalid date format: '" + str_date + "'.\nNo day of month value can be found.");
		}
		if (!RE_NUM.exec(arr_date[0]))
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		 return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\nAllowed values are unsigned integers.");
		}
		if (!arr_date[1]) 
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		return cal_error ("Invalid date format: '" + str_date + "'.\nNo month value can be found.");
		}
		if (validmonth==false)
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		 return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed values are month abbr..");
		}
		if (!arr_date[2])
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		 return cal_error ("Invalid date format: '" + str_date + "'.\nNo year value can be found.");
		}
		if (!RE_NUM.exec(arr_date[2]))
		{
		  str_dateField.value = '';
		  str_dateField.focus();
		  return cal_error ("Invalid year value: '" + arr_date[2] + "'.\nAllowed values are unsigned integers.");
		}
		var dt_date = new Date();
		dt_date.setDate(1);
	
		if (Month < 1 || Month > 12) return cal_error ("Invalid month value: '" + arr_date[1] + "'.\nAllowed range is 01-12.");
		dt_date.setMonth(Month-1);
		 
		if (arr_date[2] < 100) arr_date[2] = Number(arr_date[2]) + (arr_date[2] < NUM_CENTYEAR ? 2000 : 1900);
		dt_date.setFullYear(arr_date[2]);
	
		var dt_numdays = new Date(arr_date[2], Month, 0);
		dt_date.setDate(arr_date[0]);
		if (dt_date.getMonth() != (Month-1)) return cal_error ("Invalid day of month value: '" + arr_date[0] + "'.\nAllowed range is 01-"+dt_numdays.getDate()+".");
	
		return (dt_date)
	}
	else	//====date format is mon-yyyy or hh-yyyy or qq-yyyy or yyyy
	{
			if(arr_date.length == 1)
			{
					//check for year value only
					if (!RE_NUM.exec(arr_date[0]))
					{
					  str_dateField.value = '';
					  str_dateField.focus();
					  return cal_error ("Invalid year value: '" + arr_date[0] + "'.\nAllowed values are unsigned integers.");
					}
			}
			else
			{
				if(arr_date[0].length == 3)	//========check for month validity
				{
				//=====================================================================\\	 
					var mon=arr_date[0];
					mon=mon.toUpperCase(mon);
					for(i=0;i<ARR_MONTH.length;i++)
					 {
					   if(mon==ARR_MONTH[i])
					   {
						 Month=i+1;
						 validmonth=true;
						 break;
					   }
					 }
				//=====================================================================\\
					if (validmonth==false)
					{
					  str_dateField.value = '';
					  str_dateField.focus();
					 return cal_error ("Invalid month value: '" + arr_date[0] + "'.\nAllowed values are month abbr..");
					}
				//=====================================================================\\
				}
				else
				{
						//=========check for hh/qq
					if(arr_date[0]== 'H2' || arr_date[0]== 'H1' || arr_date[0]== 'Q1' || arr_date[0]== 'Q2' || arr_date[0]== 'Q3' || arr_date[0]== 'Q4')
					{
					}
					else
					{
					  	str_dateField.value = '';
					  	str_dateField.focus();
						 return cal_error ("Invalid date format: '" + str_date + "'.\nFormat accepted is DD-MON-YYYY.");
					}
				}
				//=====================================================================\\
				//=====================================================================\\
			}
	}
}