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}

// ------------------------------------------------------------------
// 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;
	}
	
// ------------------------------------------------------------------
// getDateFromFormat( date_string , format_string )
//
// This function takes a date string and a format string. It matches
// If the date string matches the format string, it returns the 
// getTime() of the date. If it does not match, it returns 0.
// ------------------------------------------------------------------
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 IsAFutureDate(thisForm, dateFormat, formatToday)
{	

	if(thisForm.IncidentDate.value=='')
		return false;

	var sDateFormat = "yyyyMMdd";
	
	switch (dateFormat)
	{
	case "1":
  		sDateFormat = "yy-MM-dd";
  		break
	case "2":
  		sDateFormat = "MM-dd-yyyy";
  		break

	case "3":
  		sDateFormat = "MM-dd-yy";
  		break
	case "4":
  		sDateFormat = "dd-MM-yyyy";
  		break
	case "5":
  		sDateFormat = "dd-MM-yy";
  		break

	case "6":
 	 	sDateFormat = "MMM dd, yyyy";
 	 	break
	case "7":
 	 	sDateFormat = "MMM dd, yy";
 	 	break
	case "8":
  		sDateFormat = "yyyy-MM-dd";
  		break
	default:
  		sDateFormat = "yyyy-MM-dd";
	}

	
	var selDate = new Date(getDateFromFormat(thisForm.IncidentDate.value,sDateFormat) );	
	//var today=new Date(getDateFromFormat(formatToday,sDateFormat));
	var today=new Date(getDateFromFormat(formatToday,"yyyyMMdd"));

	
	if(today.compareDatesOnly(selDate, today)< 0)
	{
		alert('Incident date is invalid!');
		thisForm.IncidentDate.focus(); 
		return true;
	}
	else 
	{
		
		return false;
	}
}   



function adjustTime(thisForm, formatToday, todayRawTime)
{
	if(thisForm.IncidentDate.value == formatToday)
	{
	
		if(todayRawTime < 43200 && thisForm.MeridiemDropDown.length == 2) 
			thisForm.MeridiemDropDown.remove(1);
	}
	else
	{
		if(thisForm.MeridiemDropDown.length < 2 && thisForm.MeridiemDropDown.length > 0)
		{
			var lm=document.createElement('option');
  			lm.text='pm';
			lm.value='p';		

			if(navigator.appName=="Microsoft Internet Explorer")
    				thisForm.MeridiemDropDown.add(lm);
			else
			{
			//	var sel=thisForm.MeridiemDropDown.options[0];  
				thisForm.MeridiemDropDown.add(lm,null);
			}
			
		} 
	}
	adjustHour(thisForm, formatToday, todayRawTime);
	adjustMin(thisForm, formatToday, todayRawTime);
}   

function adjustHour(thisForm, formatToday, todayRawTime)
{
	if(thisForm.IncidentDate.value == formatToday && thisForm.MeridiemDropDown.selectedIndex == thisForm.MeridiemDropDown.length - 1)
	{
		var hour = Math.floor(todayRawTime/3600) % 12;
			for(var k = 0; k < 12 ; k++)
				thisForm.HourDropDown.remove(0);
			
			for(var s = 0; s <= hour ; s++)
			{
			var Im;
				if(s==0)
				{
					lm=document.createElement('option');
					lm.text= '12';
					lm.value='12' + '00' ;
				}
				else
				{
					lm=document.createElement('option');
					lm.text= String(s);
					lm.value=String(s) + '00' ;
				}	
				if(navigator.appName=="Microsoft Internet Explorer")
    					thisForm.HourDropDown.add(lm);
				else
					thisForm.HourDropDown.add(lm,null);
			}
			
	}
	else
	{
		if(thisForm.HourDropDown.length < 12 && thisForm.HourDropDown.length > 0)
		{
			var hour = thisForm.HourDropDown.options[thisForm.HourDropDown.length-1].text;
			if(hour == '12' && thisForm.IncidentDate.value == formatToday && thisForm.MeridiemDropDown.selectedIndex != thisForm.MeridiemDropDown.length - 1)
			{
				for(var i = 1; i < hour; i++)
				{
					var lm=document.createElement('option');
					lm.text= String(i);
					lm.value=String(i) + '00' ;		
	
					if(navigator.appName=="Microsoft Internet Explorer")
							thisForm.HourDropDown.add(lm);
					else
						thisForm.HourDropDown.add(lm,null);
				}
			}
			else if(hour == '12' && thisForm.IncidentDate.value != formatToday)
			{
				for(var i = 1; i < hour; i++)
				{
					var lm=document.createElement('option');
					lm.text= String(i);
					lm.value=String(i) + '00' ;		
	
					if(navigator.appName=="Microsoft Internet Explorer")
							thisForm.HourDropDown.add(lm);
					else
						thisForm.HourDropDown.add(lm,null);
				}
			}
			else
			{
				var index = Math.abs(hour) +1;			
				for(var i = index; i < 12; i++)
				{
					var lm=document.createElement('option');
					lm.text= String(i);
					lm.value=String(i) + '00' ;		
	
					if(navigator.appName=="Microsoft Internet Explorer")
							thisForm.HourDropDown.add(lm);
					else
						thisForm.HourDropDown.add(lm,null);
				}
			}
		}

	}

}


function adjustMin(thisForm, formatToday, todayRawTime)
{
	if(thisForm.IncidentDate.value == formatToday && thisForm.MeridiemDropDown.selectedIndex == thisForm.MeridiemDropDown.length - 1 && thisForm.HourDropDown.selectedIndex == thisForm.HourDropDown.length - 1)
	{
		
			var min = Math.floor((todayRawTime- Math.floor(todayRawTime/3600)*3600)/60);		
			min /= thisForm.Interval.value;	
			min++;
			for( i = min; i <= 60 / thisForm.Interval.value ; i++)	 
				thisForm.MinuteDropDown.remove(min);
		
	}
	else
	{
		if(thisForm.MinuteDropDown.length < 60 && thisForm.MinuteDropDown.length > 0)
		{
			
			var min = thisForm.MinuteDropDown.options[thisForm.MinuteDropDown.length-1].text;
			var Interval = thisForm.Interval.value;
			min = parseInt(min) + parseInt(Interval);			
			for(var i = min ; i < 60 ; )
			{
				var lm=document.createElement('option');
  				lm.text= String(i) ;
				if(lm.text.length == 1)
				   lm.text = '0' + lm.text;
				lm.value=lm.text;		

				if(navigator.appName=="Microsoft Internet Explorer")
    				thisForm.MinuteDropDown.add(lm);
				else
					thisForm.MinuteDropDown.add(lm,null);
					
				i = parseInt(i) + parseInt(Interval);	
			}
			
		}

	}

}