var preloadFlag = false;

function newImage(src, width, height) {
	if (document.images) {
		rslt = new Image();
		rslt.src = src;
		rslt.width = width;
		rslt.height = height;
		preloadFlag = true;
		return rslt;
	}
}

function changeImages(imgName, imgChgToName) {
	if (preloadFlag == true) {
		imgName.src = imgChgToName.src;
		imgName.width = imgChgToName.width;
		imgName.height = imgChgToName.height;
  }
}

function isNumeric(ctl) {
	if (isNaN(parseInt(ctl.value,10))) {
		return false;
	}
	else {
		return true;
	}
}

function isObject(a) {
    return (a && typeof a == 'object') || isFunction(a);
}

function isString(a) {
    return typeof a == 'string';
}

function isUndefined(a) {
    return typeof a == 'undefined';
} 

function limitMaxLength(ctl, l)
{
  if (ctl.value.length > l) {
    ctl.value=ctl.value.substring(0,l);
  }
}

function UCase(ctl) {
  ctl.value = ctl.value.toUpperCase();
  return false;
}

function trim(value) {
  var temp = value;
  var obj = /^(\s*)([\W\w]*)(\b\s*$)/;
  if (obj.test(temp)) { 
    temp = temp.replace(obj, '$2'); 
  }
  var obj = /  /g;
  while (temp.match(obj)) { temp = temp.replace(obj, " "); }
  return temp;
}

function tokCnt(value, token) {
  var cnt = 0;
  var i=0;
      
  if (value == null) {return -1;}
  for (i=0; i < value.length; i++) {
    if (value.charAt(i) == token) {cnt++;};
  }
  return cnt; 
}

function checkValidDate(dateStr) {
  // dateStr must be of format month day year with either slashes
  // or dashes separating the parts. Some minor changes would have
  // to be made to use day month year or another format.
  // This function returns True if the date is valid.
  var slash1 = dateStr.indexOf("/");
  if (slash1 == -1) { slash1 = dateStr.indexOf("-"); }
  // if no slashes or dashes, invalid date
  if (slash1 == -1) { return false; }
  var dateMonth = dateStr.substring(0, slash1)
  var dateMonthAndYear = dateStr.substring(slash1+1, dateStr.length);
  var slash2 = dateMonthAndYear.indexOf("/");
  if (slash2 == -1) { slash2 = dateMonthAndYear.indexOf("-"); }
  // if not a second slash or dash, invalid date
  if (slash2 == -1) { return false; }
  var dateDay = dateMonthAndYear.substring(0, slash2);
  var dateYear = dateMonthAndYear.substring(slash2+1, dateMonthAndYear.length);
  if ( (dateMonth == "") || (dateDay == "") || (dateYear == "") ) { return false; }
  // if any non-digits in the month, invalid date
  for (var x=0; x < dateMonth.length; x++) {
      var digit = dateMonth.substring(x, x+1);
      if ((digit < "0") || (digit > "9")) { return false; }
  }
  // convert the text month to a number
  var numMonth = 0;
  for (var x=0; x < dateMonth.length; x++) {
      digit = dateMonth.substring(x, x+1);
      numMonth *= 10;
      numMonth += parseInt(digit);
  }
  if ((numMonth <= 0) || (numMonth > 12)) { return false; }
  // if any non-digits in the day, invalid date
  for (var x=0; x < dateDay.length; x++) {
      digit = dateDay.substring(x, x+1);
      if ((digit < "0") || (digit > "9")) { return false; }
  }
  // convert the text day to a number
  var numDay = 0;
  for (var x=0; x < dateDay.length; x++) {
      digit = dateDay.substring(x, x+1);
      numDay *= 10;
      numDay += parseInt(digit);
  }
  if ((numDay <= 0) || (numDay > 31)) { return false; }
  // February can't be greater than 29 (leap year calculation comes later)
  if ((numMonth == 2) && (numDay > 29)) { return false; }
  // check for months with only 30 days
  if ((numMonth == 4) || (numMonth == 6) || (numMonth == 9) || (numMonth == 11)) { 
      if (numDay > 30) { return false; } 
  }
  // if any non-digits in the year, invalid date
  for (var x=0; x < dateYear.length; x++) {
      digit = dateYear.substring(x, x+1);
      if ((digit < "0") || (digit > "9")) { return false; }
  }
  // convert the text year to a number
  var numYear = 0;
  for (var x=0; x < dateYear.length; x++) {
      digit = dateYear.substring(x, x+1);
      numYear *= 10;
      numYear += parseInt(digit);
  }
  // Year must be a 2-digit year or a 4-digit year
  if ( (dateYear.length != 2) && (dateYear.length != 4) ) { return false; }
  // if 2-digit year, use 50 as a pivot date
  if ( (numYear < 50) && (dateYear.length == 2) ) { numYear += 2000; }
  if ( (numYear < 100) && (dateYear.length == 2) ) { numYear += 1900; }
  if ((numYear <= 0) || (numYear > 9999)) { return false; }
  // check for leap year if the month and day is Feb 29
  if ((numMonth == 2) && (numDay == 29)) {
      var div4 = numYear % 4;
      var div100 = numYear % 100;
      var div400 = numYear % 400;
      // if not divisible by 4, then not a leap year so Feb 29 is invalid
      if (div4 != 0) { return false; }
      // at this point, year is divisible by 4. So if year is divisible by
      // 100 and not 400, then it's not a leap year so Feb 29 is invalid
      if ((div100 == 0) && (div400 != 0)) { return false; }
  }
  // date is valid
  return true;
}

function checkValidDateYMD(dateStr) {
  // dateStr must be of format year month day with either slashes
  // or dashes separating the parts. Some minor changes would have
  // to be made to use day month year or another format.
  // This function returns True if the date is valid.
  var slash1 = dateStr.indexOf("/");
  if (slash1 == -1) { slash1 = dateStr.indexOf("-"); }
  // if no slashes or dashes, invalid date
  if (slash1 == -1) { return false; }
  var dateYear = dateStr.substring(0, slash1)
  var dateMonthAndDay = dateStr.substring(slash1+1, dateStr.length);
  var slash2 = dateMonthAndDay.indexOf("/");
  if (slash2 == -1) { slash2 = dateMonthAndDay.indexOf("-"); }
  // if not a second slash or dash, invalid date
  if (slash2 == -1) { return false; }
  var dateMonth = dateMonthAndDay.substring(0, slash2);
  var dateDay = dateMonthAndDay.substring(slash2+1, dateMonthAndDay.length);
  if ( (dateMonth == "") || (dateDay == "") || (dateYear == "") ) { return false; }
  // if any non-digits in the month, invalid date
  for (var x=0; x < dateMonth.length; x++) {
      var digit = dateMonth.substring(x, x+1);
      if ((digit < "0") || (digit > "9")) { return false; }
  }
  // convert the text month to a number
  var numMonth = 0;
  for (var x=0; x < dateMonth.length; x++) {
      digit = dateMonth.substring(x, x+1);
      numMonth *= 10;
      numMonth += parseInt(digit);
  }
  if ((numMonth <= 0) || (numMonth > 12)) { return false; }
  // if any non-digits in the day, invalid date
  for (var x=0; x < dateDay.length; x++) {
      digit = dateDay.substring(x, x+1);
      if ((digit < "0") || (digit > "9")) { return false; }
  }
  // convert the text day to a number
  var numDay = 0;
  for (var x=0; x < dateDay.length; x++) {
      digit = dateDay.substring(x, x+1);
      numDay *= 10;
      numDay += parseInt(digit);
  }
  if ((numDay <= 0) || (numDay > 31)) { return false; }
  // February can't be greater than 29 (leap year calculation comes later)
  if ((numMonth == 2) && (numDay > 29)) { return false; }
  // check for months with only 30 days
  if ((numMonth == 4) || (numMonth == 6) || (numMonth == 9) || (numMonth == 11)) { 
      if (numDay > 30) { return false; } 
  }
  // if any non-digits in the year, invalid date
  for (var x=0; x < dateYear.length; x++) {
      digit = dateYear.substring(x, x+1);
      if ((digit < "0") || (digit > "9")) { return false; }
  }
  // convert the text year to a number
  var numYear = 0;
  for (var x=0; x < dateYear.length; x++) {
      digit = dateYear.substring(x, x+1);
      numYear *= 10;
      numYear += parseInt(digit);
  }
  // Year must be a 2-digit year or a 4-digit year
  if ( (dateYear.length != 2) && (dateYear.length != 4) ) { return false; }
  // if 2-digit year, use 50 as a pivot date
  if ( (numYear < 50) && (dateYear.length == 2) ) { numYear += 2000; }
  if ( (numYear < 100) && (dateYear.length == 2) ) { numYear += 1900; }
  if ((numYear <= 0) || (numYear > 9999)) { return false; }
  // check for leap year if the month and day is Feb 29
  if ((numMonth == 2) && (numDay == 29)) {
      var div4 = numYear % 4;
      var div100 = numYear % 100;
      var div400 = numYear % 400;
      // if not divisible by 4, then not a leap year so Feb 29 is invalid
      if (div4 != 0) { return false; }
      // at this point, year is divisible by 4. So if year is divisible by
      // 100 and not 400, then it's not a leap year so Feb 29 is invalid
      if ((div100 == 0) && (div400 != 0)) { return false; }
  }
  // date is valid
  return true;
}

function queryLogOff (loginPage) {
	var bLogOff = false;
	bLogOff = confirm("  Are you sure you want to log off \n(your current order will be deleted)?");
	if (bLogOff) {
		location=loginPage;
		return true;
	}

	return false;
}	

function queryLO (loginPage) {
	var bLogOff = false;
	bLogOff = confirm("Are you sure you want to log off?");
	if (bLogOff) {
		location=loginPage;
		return true;
	}

	return false;
}	

function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
			result = true;
			
		var goodEmail = email.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
		if (goodEmail)
			result = true;
  }
  return result;
}

function formElemtExist(f, name) {
	//parameters : f    = document.form
	//             name = element name to look for
	if (f.elements.length > 0) {
		for (var i=0; i<f.elements.length; i++) {
			if (f.elements[i].name == name) return true;
		}
	}
	return false;
}