// Check browser version
var isNav4 = false, isNav5 = false, isIE4 = false
var strSeperator = "/"; 
// If you are using any Java validation on the back side you will want to use the / because 
// Java date validations do not recognize the dash as a valid date separator.
var vDateType = 1; // Global value for type of date format
//                1 = mm/dd/yyyy
//                2 = yyyy/dd/mm  (Unable to do date check at this time)
//                3 = dd/mm/yyyy
var vYearType = 4; //Set to 2 or 4 for number of digits in the year for Netscape
var vYearLength = 2; // Set to 4 if you want to force the user to enter 4 digits for the year before validating.
var err = 0; // Set the error code to a default of zero
if(navigator.appName == "Netscape") {
if (navigator.appVersion < "5") {
isNav4 = true;
isNav5 = false;
}
else
if (navigator.appVersion > "4") {
isNav4 = false;
isNav5 = true;
   }
}
else {
isIE4 = true;
}

function DateFormat(vDateName, vDateValue, e, dateCheck, dateType) {
	vDateType = dateType;
	// vDateName = object name
	// vDateValue = value in the field being checked
	// e = event
	// dateCheck 
	// True  = Verify that the vDateValue is a valid date
	// False = Format values being entered into vDateValue only
	// vDateType
	// 1 = mm/dd/yyyy
	// 2 = yyyy/mm/dd
	// 3 = dd/mm/yyyy
	//Enter a tilde sign for the first number and you can check the variable information.
	if (vDateValue == "~") {
	alert("AppVersion = "+navigator.appVersion+" \nNav. 4 Version = "+isNav4+" \nNav. 5 Version = "+isNav5+" \nIE Version = "+isIE4+" \nYear Type = "+vYearType+" \nDate Type = "+vDateType+" \nSeparator = "+strSeperator);
	vDateName.value = "";
	vDateName.focus();
	return true;
	}
	var whichCode = (window.Event) ? e.which : e.keyCode;
	// Check to see if a seperator is already present.
	// bypass the date if a seperator is present and the length greater than 8
	if (vDateValue.length > 8 && isNav4) {
	if ((vDateValue.indexOf("-") >= 1) || (vDateValue.indexOf("/") >= 1))
	return true;
	}
	//Eliminate all the ASCII codes that are not valid
	var alphaCheck = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/-";
	if (alphaCheck.indexOf(vDateValue) >= 1) {
	if (isNav4) {
	vDateName.value = "";
	vDateName.focus();
	vDateName.select();
	return false;
	}
	else {
	vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
	return false;
		 }
	}
	if (whichCode == 8) //Ignore the Netscape value for backspace. IE has no value
	return false;
	else {
	//Create numeric string values for 0123456789/
	//The codes provided include both keyboard and keypad values
	var strCheck = '47,48,49,50,51,52,53,54,55,56,57,58,59,95,96,97,98,99,100,101,102,103,104,105';
	if (strCheck.indexOf(whichCode) != -1) {
	if (isNav4) {
	if (((vDateValue.length < 6 && dateCheck) || (vDateValue.length == 7 && dateCheck)) && (vDateValue.length >=1)) {
	alert("Invalid Date\nPlease Re-Enter");
	vDateName.value = "";
	vDateName.focus();
	vDateName.select();
	return false;
	}
	if (vDateValue.length == 6 && dateCheck) {
	var mDay = vDateName.value.substr(2,2);
	var mMonth = vDateName.value.substr(0,2);
	var mYear = vDateName.value.substr(4,4)
	//Turn a two digit year into a 4 digit year
	if (mYear.length == 2 && vYearType == 4) {
	var mToday = new Date();
	//If the year is greater than 30 years from now use 19, otherwise use 20
	var checkYear = mToday.getFullYear() + 30; 
	var mCheckYear = '20' + mYear;
	if (mCheckYear >= checkYear)
	mYear = '19' + mYear;
	else
	mYear = '20' + mYear;
	}
	var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
	if (!dateValid(vDateValueCheck)) {
	alert("Invalid Date\nPlease Re-Enter.");
	vDateName.value = "";
	vDateName.focus();
	vDateName.select();
	return false;
	}
	return true;
	}
	else {
	// Reformat the date for validation and set date type to a 1
	if (vDateValue.length >= 8  && dateCheck) {
	if (vDateType == 1) // mmddyyyy
	{
	var mDay = vDateName.value.substr(2,2);
	var mMonth = vDateName.value.substr(0,2);
	var mYear = vDateName.value.substr(4,4)
	vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
	}
	if (vDateType == 2) // yyyymmdd
	{
	var mYear = vDateName.value.substr(0,4)
	var mMonth = vDateName.value.substr(4,2);
	var mDay = vDateName.value.substr(6,2);
	vDateName.value = mYear+strSeperator+mMonth+strSeperator+mDay;
	}
	if (vDateType == 3) // ddmmyyyy
	{
	var mMonth = vDateName.value.substr(2,2);
	var mDay = vDateName.value.substr(0,2);
	var mYear = vDateName.value.substr(4,4)
	vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
	}
	//Create a temporary variable for storing the DateType and change
	//the DateType to a 1 for validation.
	var vDateTypeTemp = vDateType;
	vDateType = 1;
	var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
	if (!dateValid(vDateValueCheck)) {
	alert("Invalid Date\nPlease Re-Enter");
	vDateType = vDateTypeTemp;
	vDateName.value = "";
	vDateName.focus();
	vDateName.select();
	return false;
	}
	vDateType = vDateTypeTemp;
	return true;
	}
	else {
	if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
	alert("Invalid Date\nPlease Re-Enter");
	vDateName.value = "";
	vDateName.focus();
	vDateName.select();
	return false;
					 }
				}
		 }
	}
	else {
	// Non isNav Check
	if (((vDateValue.length < 8 && dateCheck) || (vDateValue.length == 9 && dateCheck)) && (vDateValue.length >=1)) {
	alert("Invalid Date\nPlease Re-Enter");
	vDateName.value = "";
	vDateName.focus();
	return true;
	}
	// Reformat date to format that can be validated. mm/dd/yyyy
	if (vDateValue.length >= 8 && dateCheck) {
	// Additional date formats can be entered here and parsed out to
	// a valid date format that the validation routine will recognize.
	if (vDateType == 1) // mm/dd/yyyy
	{
	var mMonth = vDateName.value.substr(0,2);
	var mDay = vDateName.value.substr(3,2);
	var mYear = vDateName.value.substr(6,4)
	}
	if (vDateType == 2) // yyyy/mm/dd
	{
	var mYear = vDateName.value.substr(0,4)
	var mMonth = vDateName.value.substr(5,2);
	var mDay = vDateName.value.substr(8,2);
	}
	if (vDateType == 3) // dd/mm/yyyy
	{
	var mDay = vDateName.value.substr(0,2);
	var mMonth = vDateName.value.substr(3,2);
	var mYear = vDateName.value.substr(6,4)
	}
	if (vYearLength == 4) {
	if (mYear.length < 4) {
	alert("Invalid Date\nPlease Re-Enter");
	vDateName.value = "";
	vDateName.focus();
	return true;
		 }
	}
	// Create temp. variable for storing the current vDateType
	var vDateTypeTemp = vDateType;
	// Change vDateType to a 1 for standard date format for validation
	// Type will be changed back when validation is completed.
	vDateType = 1;
	// Store reformatted date to new variable for validation.
	var vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
	if (mYear.length == 2 && vYearType == 4 && dateCheck) {
	//Turn a two digit year into a 4 digit year
	var mToday = new Date();
	//If the year is greater than 30 years from now use 19, otherwise use 20
	var checkYear = mToday.getFullYear() + 30; 
	var mCheckYear = '20' + mYear;
	if (mCheckYear >= checkYear)
	mYear = '19' + mYear;
	else
	mYear = '20' + mYear;
	vDateValueCheck = mMonth+strSeperator+mDay+strSeperator+mYear;
	// Store the new value back to the field.  This function will
	// not work with date type of 2 since the year is entered first.
	if (vDateTypeTemp == 1) // mm/dd/yyyy
	vDateName.value = mMonth+strSeperator+mDay+strSeperator+mYear;
	if (vDateTypeTemp == 3) // dd/mm/yyyy
	vDateName.value = mDay+strSeperator+mMonth+strSeperator+mYear;
	} 
	if (!dateValid(vDateValueCheck)) {
	alert("Invalid Date\nPlease Re-Enter");
	vDateType = vDateTypeTemp;
	vDateName.value = "";
	vDateName.focus();
	return true;
	}
	vDateType = vDateTypeTemp;
	return true;
	}
	else {
	if (vDateType == 1) {
	if (vDateValue.length == 2) {
	vDateName.value = vDateValue+strSeperator;
	}
	if (vDateValue.length == 5) {
	vDateName.value = vDateValue+strSeperator;
		 }
	}
	if (vDateType == 2) {
	if (vDateValue.length == 4) {
	vDateName.value = vDateValue+strSeperator;
	}
	if (vDateValue.length == 7) {
	vDateName.value = vDateValue+strSeperator;
		 }
	} 
	if (vDateType == 3) {
	if (vDateValue.length == 2) {
	vDateName.value = vDateValue+strSeperator;
	}
	if (vDateValue.length == 5) {
	vDateName.value = vDateValue+strSeperator;
		 }
	}
	return true;
		 }
	}
	if (vDateValue.length == 10&& dateCheck) {
	if (!dateValid(vDateName)) {
	// Un-comment the next line of code for debugging the dateValid() function error messages
	//alert(err);  
	alert("Invalid Date\nPlease Re-Enter");
	vDateName.focus();
	vDateName.select();
		 }
	}
	return false;
	}
	else {
	// If the value is not in the string return the string minus the last
	// key entered.
	if (isNav4) {
	vDateName.value = "";
	vDateName.focus();
	vDateName.select();
	return false;
	}
	else
	{
	vDateName.value = vDateName.value.substr(0, (vDateValue.length-1));
	return false;
					 }
				}
		 }
}
function dateValid(objName) {
	var strDate;
	var strDateArray;
	var strDay;
	var strMonth;
	var strYear;
	var intday;
	var intMonth;
	var intYear;
	var booFound = false;
	var datefield = objName;
	var strSeparatorArray = new Array("-"," ","/",".");
	var intElementNr;
	// var err = 0;
	var strMonthArray = new Array(12);
	strMonthArray[0] = "Jan";
	strMonthArray[1] = "Feb";
	strMonthArray[2] = "Mar";
	strMonthArray[3] = "Apr";
	strMonthArray[4] = "May";
	strMonthArray[5] = "Jun";
	strMonthArray[6] = "Jul";
	strMonthArray[7] = "Aug";
	strMonthArray[8] = "Sep";
	strMonthArray[9] = "Oct";
	strMonthArray[10] = "Nov";
	strMonthArray[11] = "Dec";
	//strDate = datefield.value;
	strDate = objName;
	if (strDate.length < 1) {
	return true;
	}
	for (intElementNr = 0; intElementNr < strSeparatorArray.length; intElementNr++) {
	if (strDate.indexOf(strSeparatorArray[intElementNr]) != -1) {
	strDateArray = strDate.split(strSeparatorArray[intElementNr]);
	if (strDateArray.length != 3) {
	err = 1;
	return false;
	}
	else {
	strDay = strDateArray[0];
	strMonth = strDateArray[1];
	strYear = strDateArray[2];
	}
	booFound = true;
		 }
	}
	if (booFound == false) {
	if (strDate.length>5) {
	strDay = strDate.substr(0, 2);
	strMonth = strDate.substr(2, 2);
	strYear = strDate.substr(4);
		 }
	}
	//Adjustment for short years entered
	if (strYear.length == 2) {
	strYear = '20' + strYear;
	}
	strTemp = strDay;
	strDay = strMonth;
	strMonth = strTemp;
	intday = parseInt(strDay, 10);
	if (isNaN(intday)) {
	err = 2;
	return false;
	}
	intMonth = parseInt(strMonth, 10);
	if (isNaN(intMonth)) {
	for (i = 0;i<12;i++) {
	if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
	intMonth = i+1;
	strMonth = strMonthArray[i];
	i = 12;
		 }
	}
	if (isNaN(intMonth)) {
	err = 3;
	return false;
		 }
	}
	intYear = parseInt(strYear, 10);
	if (isNaN(intYear)) {
	err = 4;
	return false;
	}
	if (intMonth>12 || intMonth<1) {
	err = 5;
	return false;
	}
	if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
	err = 6;
	return false;
	}
	if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
	err = 7;
	return false;
	}
	if (intMonth == 2) {
	if (intday < 1) {
	err = 8;
	return false;
	}
	if (LeapYear(intYear) == true) {
	if (intday > 29) {
	err = 9;
	return false;
		 }
	}
	else {
	if (intday > 28) {
	err = 10;
	return false;
				}
		 }
	}
	return true;
}
function LeapYear(intYear) {
	if (intYear % 100 == 0) {
	if (intYear % 400 == 0) { return true; }
	}
	else {
	if ((intYear % 4) == 0) { return true; }
	}
	return false;
}


function FieldLoop() {

	var CheckDate = false;
	var StartField, EndField;
	with (document.search) {
		StartField = search_start.value;
		EndField = search_end.value;
	// check the start date
	CheckDate = isDate(StartField);
	
	if (CheckDate) {
		// continue to the ending date
		CheckDate = isDate(EndField);
		if (CheckDate) {
			return true;
			} 
		else {
			search_end.focus();
			search_end.select();
			return false;
			}
		} 
	else {
		search_start.focus();
		search_start.select();
		return false;
		}
	} // end with

}

function isDate(dateStr) {

	var datePat = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)(\d{4})$/;
	var matchArray = dateStr.match(datePat); // is the format ok?
	
//	if (matchArray == null) {
//	alert("Please enter date as either mm/dd/yyyy or mm-dd-yyyy.");
//	return false;
//	}
	
	month = matchArray[1]; // p@rse date into variables
	day = matchArray[3];
	year = matchArray[5];
	
	if (month < 1 || month > 12) { // check month range
	alert("Month must be between 1 and 12.");
	return false;
	}
	
	if (day < 1 || day > 31) {
	alert("Day must be between 1 and 31.");
	return false;
	}
	
	if ((month==4 || month==6 || month==9 || month==11) && day==31) {
	alert("Month "+month+" doesn`t have 31 days!")
	return false;
	}
	
	if (month == 2) { // check for february 29th
	var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
	if (day > 29 || (day==29 && !isleap)) {
	alert("February " + year + " doesn`t have " + day + " days!");
	return false;
	}
	}
	return true; // date is valid
}


function DisplayClock() {
		
	var Today = new Date();
	var week, month; 
	
	switch (Today.getDay()) {
		case 0:
			week = "Sunday";
			break;
		case 1:
			week = "Monday";
			break;
		case 2:
			week = "Tuesday";
			break;
		case 3:
			week = "Wednesday";
			break;
		case 4:
			week = "Thursday";
			break;
		case 5:
			week = "Friday";
			break;
		case 6:
			week = "Saturday";
			break;
	} 
	
	switch (Today.getMonth()) {
		case 0:
			month = "January";
			break;
		case 1:
			month = "February";
			break;
		case 2:
			month = "March";
			break;
		case 3:
			month = "April";
			break;
		case 4:
			month = "May";
			break;
		case 5:
			month = "June";
			break;
		case 6:
			month = "July";
			break;
		case 7:
			month = "August";
			break;
		case 8:
			month = "September";
			break;
		case 9:
			month = "October";
			break;
		case 10:
			month = "November";
			break;
		case 11:
			month = "December";
			break;
	} 
	document.write (week + " " + month + " " + Today.getDate() + ", " + Today.getYear()); 
}