function checkDate( dateToCheck, startDate, endDate )
{
	valid = true;
	if ( startDate && dateToCheck < startDate)
	{
		valid = false;
	}

	if ( endDate && dateToCheck > endDate)
	{
		valid = false;
	}

	return valid;
}

function checkDate( elementId, format, startDate, endDate, disabledDaysOfWeek, inValidDateMessage, startDateMessage, endDateMessage )
{
	var message = '';
	var dateValue = $( '#' + elementId ).val();
	var valid = true;
	if ( dateValue && dateValue != '' )
	{
		var dateToCheck = Date.parseExact( dateValue, format );
		if ( dateToCheck )
		{
			if ( startDate && dateToCheck < startDate)
			{
				valid = false;
				message = message + inValidDateMessage + ' \'' + $( '#' + elementId ).val() + '\' ' + startDateMessage + ' \'' + startDate.toString( format ) + '\'.';
			}

			if ( endDate && dateToCheck > endDate)
			{
				valid = false;
				message = message + inValidDateMessage + ' \'' + $( '#' + elementId ).val() + '\' ' + endDateMessage + ' \'' + endDate.toString( format ) + '\'.';
			}

			if ( valid && disabledDaysOfWeek )
			{
				for ( var i = 0; i < disabledDaysOfWeek.length; i++ )
				{
					if ( dateToCheck.getDay() == disabledDaysOfWeek[i] )
					{
						valid = false;
						message = message + inValidDateMessage + ' \'' + $( '#' + elementId ).val() + '\'';
					}
				}
			}
		}
		else
		{
			valid = false;
			message = message + inValidDateMessage + ' \'' + $( '#' + elementId ).val() + '\'.';
		}
	}

	if ( valid )
	{
		removeAlert( elementId + '_validationAlert' );
	}
	else
	{
		removeAlert( elementId + '_validationAlert' );
		addAlert( 'alert-error', message, elementId + '_validationAlert' );
	}

	return valid;
}

function dateRange( range, format, beginDateElementId, endDateElementId, dateRangeElementId )
{
	if ( range )
	{
		if ( range.toLowerCase() == 'today' )
		{
			$( '#' + beginDateElementId ).val( Date.today().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().toString( format ) );
		}
		else if ( range.toLowerCase() == 'this week' )
		{
			$( '#' + beginDateElementId ).val( Date.sunday().toString( format ) );
			$( '#' + endDateElementId ).val( Date.sunday().addDays( 7 ).toString( format ) );
		}
		else if ( range.toLowerCase() == 'this month' )
		{
			$( '#' + beginDateElementId ).val( Date.today().moveToFirstDayOfMonth().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().moveToLastDayOfMonth().toString( format ) );
		}
		else if ( range.toLowerCase() == 'this year' )
		{
			$( '#' + beginDateElementId ).val( Date.january().moveToFirstDayOfMonth().toString( format ) );
			$( '#' + endDateElementId ).val( Date.december().moveToLastDayOfMonth().toString( format ) );
		}
		else if ( range.toLowerCase() == 'week to date' )
		{
			$( '#' + beginDateElementId ).val( Date.sunday().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().toString( format ) );
		}
		else if ( range.toLowerCase() == 'month to date' )
		{
			$( '#' + beginDateElementId ).val( Date.today().moveToFirstDayOfMonth().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().toString( format ) );
		}
		else if ( range.toLowerCase() == 'year to date' )
		{
			$( '#' + beginDateElementId ).val( Date.january().moveToFirstDayOfMonth().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().toString( format ) );
		}		
		else if ( range.toLowerCase() == 'yesterday' )
		{
			$( '#' + beginDateElementId ).val( Date.today().addDays( -1 ).toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().addDays( -1 ).toString( format ) );
		}
		else if ( range.toLowerCase() == 'last week' )
		{
			$( '#' + beginDateElementId ).val( Date.sunday().addDays( -7 ).toString( format ) );
			$( '#' + endDateElementId ).val( Date.sunday().addDays( -1 ).toString( format ) );
		}
		else if ( range.toLowerCase() == 'last month' )
		{
			$( '#' + beginDateElementId ).val( Date.today().addMonths( -1 ).moveToFirstDayOfMonth().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().addMonths( -1 ).moveToLastDayOfMonth().toString( format ) );
		}
		else if ( range.toLowerCase() == 'last year' )
		{
			$( '#' + beginDateElementId ).val( Date.january().moveToFirstDayOfMonth().addYears( -1 ).toString( format ) );
			$( '#' + endDateElementId ).val( Date.december().moveToLastDayOfMonth().addYears( -1 ).toString( format ) );
		}
		else if ( range.toLowerCase() == 'tomorrow' )
		{
			$( '#' + beginDateElementId ).val( Date.today().addDays( 1 ).toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().addDays( 1 ).toString( format ) );
		}
		else if ( range.toLowerCase() == 'next week' )
		{
			$( '#' + beginDateElementId ).val( Date.sunday().addDays( 7 ).toString( format ) );
			$( '#' + endDateElementId ).val( Date.sunday().addDays( 13 ).toString( format ) );
		}
		else if ( range.toLowerCase() == 'next month' )
		{
			$( '#' + beginDateElementId ).val( Date.today().addMonths( 1 ).moveToFirstDayOfMonth().toString( format ) );
			$( '#' + endDateElementId ).val( Date.today().addMonths( 1 ).moveToLastDayOfMonth().toString( format ) );
		}
		else if ( range.toLowerCase() == 'next year' )
		{
			$( '#' + beginDateElementId ).val( Date.january().moveToFirstDayOfMonth().addYears( 1 ).toString( format ) );
			$( '#' + endDateElementId ).val( Date.december().moveToLastDayOfMonth().addYears( 1 ).toString( format ) );
		}

		if ( dateRangeElementId )
		{
			clearRange( dateRangeElementId );
			selectRange( dateRangeElementId, range );
		}
	}
}

function checkRange( format, startDateElementId, endDateElementId, changingElementId, message )
{
	var startDateValue = $( '#' + startDateElementId ).val();
	var endDateValue = $( '#' + endDateElementId ).val();
	if ( startDateValue && endDateValue )
	{
		var startDateToCheck = Date.parseExact( startDateValue, format );
		var endDateToCheck = Date.parseExact( endDateValue, format );
		if ( startDateToCheck && endDateToCheck )
		{
			if ( startDateToCheck > endDateToCheck )
			{
				valid = false;
				removeAlert( startDateElementId + '_validationAlert' );
				removeAlert( endDateElementId + '_validationAlert' );
				if ( changingElementId == startDateElementId )
				{
					$( '#' + endDateElementId ).val( '' );
				}
				else
				{
					$( '#' + startDateElementId ).val( '' );
					addAlert( 'alert-error', message, startDateElementId + '_validationAlert' );
				}
			}
		}
	}
}

function clearRange( dateRangeElementId )
{
	$( '#' + dateRangeElementId ).val( '' );
	$('a[id^="' + dateRangeElementId + '"]').css('font-weight','normal');
}

function selectRange( dateRangeElementId, range )
{
	$( '#' + dateRangeElementId ).val( range.toLowerCase() );
	if ( range && dateRangeElementId )
	{
		var rangeAnchorId = dateRangeElementId + '_' + range.replace(/ /g,"_").toUpperCase();
		$( '#' + rangeAnchorId ).css('font-weight','bold');
	}
}

function getDate( dateElementId, format )
{
	var dateObject = null;
	var dateValue = $( '#' + dateElementId ).val();
	if ( dateValue )
	{
		dateObject = Date.parseExact( dateValue, format );
	}
	return dateObject;
}

function getDay( dateElementId, format )
{
	var day = null;
	var dateObject = getDate( dateElementId, format );
	if ( dateObject )
	{
		day = dateObject.getDate();
	}
	return day;
}

function getMonth( dateElementId, format )
{
	var month = null;
	var dateObject = getDate( dateElementId, format );
	if ( dateObject )
	{
		month = dateObject.getMonth() + 1;
	}
	return month;
}

function getYear( dateElementId, format )
{
	var year = null;
	var dateObject = getDate( dateElementId, format );
	if ( dateObject )
	{
		year = dateObject.getFullYear();
	}
	return year;
}