function lneSetDefaultDate()
{
//	Set date field default to today
	var strNow = new Date();
	document.forms[0].txtDayFrom.value = strNow.getDate();
	document.forms[0].lstMonthFrom.selectedIndex = strNow.getMonth();
	document.forms[0].txtYearFrom.value = strNow.getFullYear();
	document.forms[0].txtDayTo.value = strNow.getDate();
	document.forms[0].lstMonthTo.selectedIndex = strNow.getMonth();
	document.forms[0].txtYearTo.value = strNow.getFullYear();
	return true;
}

function stdDateCalc(strDate)
{
	if ((strDate != "") && (strDate != "ALL"))
	{
		dateBase = new Date();
		strPeriod = strDate.substring(2, 4);

		if (strDate.substring(0, 1) == "B")
			intDelta = 10;
		else
			intDelta = strDate.substring(0, 1);
		if (strPeriod == "WK")
		{
			intDelta *= 7;
			intDelta--;
			dateBase.setDate(dateBase.getDate() - intDelta);
		}
		if (strPeriod == "MO")
			dateBase.setMonth(dateBase.getMonth() - intDelta);
		if (strPeriod == "YR")
			dateBase.setYear(dateBase.getYear() - intDelta);
		strDate = (dateBase.getMonth() + 1) + "/" + dateBase.getDate() + "/" + dateBase.getFullYear();
	}

	return strDate;
}

function enhDateCalc(strDate, boolFrom)
{
	var aryMonthNames = new Array("jan", "feb", "mar", "apr", "may", "jun", "jul", "aug", "sep", "oct", "nov", "dec");
	var boolTextMonth = false;
	var	intMonth;
	var intDay;
	var intYear;
	var strDateOrig = strDate;
	var aryResults;

	for (i = 0; i <= (strDate.length - 3); i++)
	{
		for (j = 0; j < 12; j++)
		{
			if (strDate.substring(i, i + 3).toLowerCase() == aryMonthNames[j])
			{
				if (i != 0)
				{
					if ((strDate.charAt(i - 1).toLowerCase() < "a") || (strDate.charAt(i - 1).toLowerCase() > "z"))
					{
						boolTextMonth = true;
						break;
					}
				}
				else
				{
					boolTextMonth = true;
					break;
				}
			}
		}
		if (boolTextMonth)
			break;
	}
	if (boolTextMonth)
	{
		intMonth = j;
		aryResults = parseForNumber(strDate);
		intDay = aryResults[0];
	} 
	else
	{
		aryResults = parseForNumber(strDate);
		intMonth = --aryResults[0];
		if (aryResults[1] == "")
			return "INVALID";

		aryResults = parseForNumber(aryResults[1]);
		intDay = aryResults[0];
	}

	if (aryResults[1] == "")
		intYear = "";
	else
	{	
		aryResults = parseForNumber(aryResults[1]);
		intYear = aryResults[0];
	}

	if (intYear == "")
	{
		intYear = intDay;
		intDay = -1;
	}
	
	if ((intYear.length != 2) && (intYear.length != 4))
		return "INVALID";

	if (intYear.length == 2)
	{
		if ((dateNow.getYear() >= 100) && ((dateNow.getYear() - 100) >= intYear))
			return "Y2K";
		else
			intYear = "19" + intYear;
	}

	if (intDay == -1)
	{
		if (boolFrom)
			intDay = 1;
		else
		{
			var dateEnd = new Date(intYear, intMonth + 1, 0);
			intDay = dateEnd.getDate();
		}
	}

	var dateTest = new Date(intYear, intMonth, intDay);
	if ((dateTest.getMonth() != intMonth) || (dateTest.getDate() != intDay) || (dateTest.getFullYear() != intYear))
		return "INVALID";
	
	strDate = (dateTest.getMonth() + 1) + "/" + dateTest.getDate() + "/" + dateTest.getFullYear();
	return strDate;			
}

function parseForNumber(strDate)
{
	var boolFound = false;
	var aryResults = new Array(0, strDate);
	var intLen = strDate.length;
	
	for (i = 0; i < intLen; i++)
		if ((strDate.charAt(i) >= "0") && (strDate.charAt(i) <= "9"))
		{
			boolFound = true;
			break;
		}

	if (boolFound)
	{	
		strDate = strDate.substring(i, intLen + 1);

		if (i == intLen - 1)
		{
			aryResults[0] = strDate;
			aryResults[1] = "";
		}
		else
		{
			for (i = 0; i < strDate.length; i++)
				if ((strDate.charAt(i) < "0") || (strDate.charAt(i) > "9"))
					break;

			aryResults[0] = strDate.substring(0, i);
			if (i != strDate.length - 1)
				aryResults[1] = strDate.substring(i, strDate.length + 1);
		}
	}

	return aryResults;
}