// global constants

var minYear=1970;

var maxYear=2037;



function setValsAndValidate(aFieldVals, action, target)

{

  for(i=0;i<aFieldVals.length;i++)

  {

    //alert ("Setting value of " + aFieldVals[i][0] + " to " + aFieldVals[i][1]);

    setValue(aFieldVals[i][0],aFieldVals[i][1])

  }

  var result = validateAndSubForm(action, target);

  if(result == false)

  {

    return false;

  }

  else

  {

    return true;

  }

}



function validateAndSubForm(task, to)

{

  // run validateForm function defined on calling page

  var result = validateForm(task);



  if(result == false)

  {

    return false;

  }

  else

  {

    subForm(to);

  }

}



function validateLogin()

{

  if (document.form1.uid.value == "" || document.form1.uid.value == null)

  {

    alert("Please enter a username.");

    document.form1.uid.focus();

    return true;

  }

  if (document.form1.pwd.value == "" || document.form1.pwd.value == null)

  {

    alert("Please enter a password.");

    document.form1.pwd.focus();

    return true;

  }



  document.form1.submit();

  return true;

}



function isBlank(field, strBodyHeader)

{

  strTrimmed = trim(field.value);

  if (strTrimmed.length > 0) return false;



  // does not alert if no message string

  if (strBodyHeader.length > 0)

  {

    alert("\"" + strBodyHeader + "\" is a required field. Please enter a value.");

    field.focus();

  }

  return true;

}



function isRadioChecked(field, strBodyHeader)

{

  var radioSelected; 



  for(var i=0; i<field.length; i++)

  {

    if(field[i].checked)

    {

      radioSelected = field[i].value 

    }

  }



  if (!radioSelected)

  {

    alert("\"" + strBodyHeader + "\" is a required field. Please select a value.");

    field[0].focus();

    return false;

  }



  return true;

}



function isCheckboxChecked(field, strBodyHeader)

{

  if (!field.checked)

  {

    alert("\"" + strBodyHeader + "\" is a required field. Please select a value.");

    field.focus();

    return false;

  }



  return true;

}



function isEmail(field)

{

  var strMsg = ""; var chAt  = '@'; var chDot = '.'; var chSpace = ' '; var strEmailAddr = trim(field.value);

  if (strEmailAddr.length == 0) return true;

  if (strEmailAddr.indexOf(chSpace) == -1) {

    var iFirstAtPos = strEmailAddr.indexOf(chAt);

    var iLastAtPos = strEmailAddr.lastIndexOf(chAt);

    if (iFirstAtPos > 0 && iFirstAtPos < (strEmailAddr.length - 1) && iFirstAtPos == iLastAtPos) {

      // look for '.' there must be at least one char between '@' and '.'

      var iDotPos = strEmailAddr.indexOf(chDot, iFirstAtPos + 1);

      if (iDotPos > (iFirstAtPos + 1) && iDotPos < (strEmailAddr.length - 1)) return true;

    }

  }

  alert("Invalid Email address. Please type in a valid Email address.");

  field.focus();

  return false;

}



function stringsMatch(strField1, strField2, strMessage)

{

  STRING1 = strField1.value;

  STRING2 = strField2.value;



  if(STRING1 != STRING2)

  {

    alert(strMessage);

    strField2.focus();

    return false;

  }



  return true;

}



function isAlphaNumeric(field, strBodyHeader)

{

  var regexp = /\W/gi; // matches any 'non-word' character

  var strOriginal = field.value;

  var strNew = strOriginal.replace(regexp, '');



  var strMessage = "\"" + strBodyHeader + "\" is required to be alphanumeric without spaces or special characters in it such as \"$#%^&!~().\".\nAs an example, removing the special characters from the information you have entered, your would use \"" + strNew + "\" instead of \"" + strOriginal + "\".";



  if(strOriginal != strNew)

  {

    alert(strMessage);

    field.focus();

    return true;

  }



  return false;

}



function isMMYYYY(field, strBodyHeader, separator)

{

  strTrimmed = trim(field.value);



  // separator must be the after first or second month number and can only be on separator

  var iFirstSepPos = strTrimmed.indexOf(separator);

  var iLastSepPos = strTrimmed.lastIndexOf(separator);

  if(strTrimmed.length != 0 && (iFirstSepPos == 1 || iFirstSepPos == 2) && iFirstSepPos == iLastSepPos)

  {

    var aParts = strTrimmed.split(separator);

    var month = aParts[0];

    var year = aParts[1];



    if(!isAcceptableYearRange(year))

    {

      alert("\"" + strBodyHeader + "\" must have a year between " + minYear + " and " + maxYear);

      field.focus();

      return false;

    }



    if((month > 0 && month < 13) && month.search(/[a-z]/gi) == -1)

    {

      if(year > 0 && year.length == 4 && year.search(/[a-z]/gi) == -1)

      {

        return true;

      }

    }

  }

  

  alert("\"" + strBodyHeader + "\" must be in the following format: MM" + separator + "YYYY.");

  field.focus();

  return false;

}



function isGreaterWMMYYYY(leftField, rightField, separator)

{

  // assumes the input values have already been validated for WMMYYYY format

  strLeftTrimmed = trim(leftField.value);

  strRightTrimmed = trim(rightField.value);



  var aLeftParts = strLeftTrimmed.split(separator);

  var aRightParts = strRightTrimmed.split(separator);

  var leftWeek = aLeftParts[0];

  var leftMonth = aLeftParts[1];

  var leftYear = aLeftParts[2];

  var rightWeek = aRightParts[0];

  var rightMonth = aRightParts[1];

  var rightYear = aRightParts[2];

  

  if(leftMonth.length == 1)

  {

    leftMonth = "0" + leftMonth;

  }

  if(rightMonth.length == 1)

  {

    rightMonth = "0" + leftMonth;

  }

  

  var leftNumber = leftYear + leftMonth + leftWeek;

  var rightNumber = rightYear + rightMonth + rightWeek;



  if(leftNumber < rightNumber)

  {

    return "right";

  }

  else if(leftNumber > rightNumber)

  {

    return "left";

  }

  else

  {

    return "same";

  }

}



function isWMMYYYY(field, strBodyHeader, separator)

{

  strTrimmed = trim(field.value);



  // separator must be the after first or second month number and can only be on separator

  var iFirstSepPos = strTrimmed.indexOf(separator);

  var iLastSepPos = strTrimmed.lastIndexOf(separator);

  if(strTrimmed.length != 0 && (iFirstSepPos == 1 || iFirstSepPos == 2) && iFirstSepPos != iLastSepPos)

  {

    var aParts = strTrimmed.split(separator);

    var week = aParts[0];

    var month = aParts[1];

    var year = aParts[2];



    if((week == "" || week == null) || !(week > 0 && week < 5) || !isIntegerNoAlert(week))

    {

      alert("\"" + strBodyHeader + "\" must have a week value between 1 and 4.");

      field.focus();

      return false;

    }

    if((month == "" || month == null) || !(month > 0 && month < 13) || !isIntegerNoAlert(month))

    {

      alert("\"" + strBodyHeader + "\" must have a month value between 1 and 12.");

      field.focus();

      return false;

    }

    if((year == "" || year == null) || !isIntegerNoAlert(year) || !isAcceptableYearRange(year))

    {

      alert("\"" + strBodyHeader + "\" must have a year between " + minYear + " and " + maxYear);

      field.focus();

      return false;

    }

    return true;

  }

  else

  {

    alert("\"" + strBodyHeader + "\" must be in the following format: W" + separator + "MM" + separator + "YYYY.");

    field.focus();

    return false;

  }

}



function isDate(field, strBodyHeader, separator)

{

  var strTrimmed = trim(field.value);

	var daysInMonth = DaysArray(12);

	var pos1=strTrimmed.indexOf(separator);

	var pos2=strTrimmed.indexOf(separator,pos1+1);

	var strMonth=strTrimmed.substring(0,pos1);

	var strDay=strTrimmed.substring(pos1+1,pos2);

	var strYear=strTrimmed.substring(pos2+1);

	strYr=strYear;

	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1);

	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1);

	for (var i = 1; i <= 3; i++)

  {

		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)

	}

  month=parseInt(strMonth)

  day=parseInt(strDay)

  year=parseInt(strYr)

  if(!isAcceptableYearRange(year))

  {

    alert("\"" + strBodyHeader + "\" must have a year between " + minYear + " and " + maxYear);

    field.focus();

    return false;

  }

	if(pos1==-1 || pos2==-1)

  {

    alert("\"" + strBodyHeader + "\" must be in the following format: MM" + separator + "DD" + separator + "YYYY.");

		field.focus();

    return false;

	}

	if (strMonth.length<1 || month<1 || month>12)

  {

		alert("\"" + strBodyHeader + "\" has an invalid month. Please enter a valid month.");

    field.focus();

		return false;

	}

	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month])

  {

		alert("\"" + strBodyHeader + "\" has an invalid day. Please enter a valid day.");

    field.focus();

		return false;

	}

	if (strYear.length != 4 || year==0)

  {

		alert("\"" + strBodyHeader + "\" has an invalid year. Please enter a valid 4 digit year.");

    field.focus();

		return false;

	}

	if (strTrimmed.indexOf(separator,pos2+1)!=-1 || isIntegerNoAlert(stripCharsInBag(strTrimmed, separator),true)==false)

  {

		alert("\"" + strBodyHeader + "\" has an invalid date. Please enter a valid date");

    field.focus();

		return false;

	}

  return true;

}



function isDollarAmount(field, strBodyHeader)

{

  var separator = ".";

  var strTrimmed = trim(field.value);

  var iFirstSepPos = strTrimmed.indexOf(separator);

  var iLastSepPos = strTrimmed.lastIndexOf(separator);

  if(strTrimmed.length != 0 && iFirstSepPos == iLastSepPos && isIntegerNoAlert(stripCharsInBag(strTrimmed, separator),true) == true)

  {

    var aParts = strTrimmed.split(separator);

    var dollars = aParts[0];

    var cents = aParts[1];

    if(dollars >= 0 && (cents == null || cents == "") || (cents >= 0  && cents.length < 3))

    {

      return true;

    }

  }



  alert("\"" + strBodyHeader + "\" must be a valid dollar amount.");

  field.focus();

  return false;

}



function isAcceptableYearRange(year)

{

  if(year<minYear || year>maxYear) return false;

  return true;

}



function isInteger(field, strBodyHeader, allowZero)

{

  var strTrimmed = trim(field.value);



  if(isIntegerNoAlert(strTrimmed, allowZero) == true) return true;



  alert("\"" + strBodyHeader + "\" must be an integer value.");

  field.focus();

  return false;

}



function isFloat(field, strBodyHeader, allowZero)

{

  if(field.value.replace(/\./g, "").search(/\D/) != -1 ||

     field.value.split(".").length > 2 )

  {

    alert("\"" + strBodyHeader + "\" must be a number with at most one decimal point.");

    field.focus();

    return false;

  }

  

  if(!allowZero && field.value == 0)

  {

    alert("\"" + strBodyHeader + "\" must be greater than zero.");

    field.focus();

    return false;

  }



  return true;

}



function isInRange(field, strBodyHeader, minVal, maxVal)

{

  var strTrimmed = trim(field.value);



  if(isInteger(field, strBodyHeader, true) != true) return false;



  if(minVal != "" && maxVal != "")

  {

    if(strTrimmed < minVal || strTrimmed > maxVal)

    {

      alert("\"" + strBodyHeader + "\" must be between " + minVal + " and " + maxVal +".");

      field.focus();

      return false;

    }

  }

  else if(minVal == "" && maxVal != "")

  {

    if(strTrimmed > maxVal)

    {

      alert("\"" + strBodyHeader + "\" must be less than " + maxVal +".");

      field.focus();

      return false;

    }

  }

  else if(minVal != "" && maxVal == "")

  {

    if(strTrimmed < minVal)

    {

      alert("\"" + strBodyHeader + "\" must be more than " + minVal +".");

      field.focus();

      return false;

    }

  }



  return true;

}



function isIntegerNoAlert(s, allowZero)

{

  if(!allowZero && (s == "0" || s == "")) return false;

  var i;

  for (i = 0; i < s.length; i++)

  {

    // Check that current character is number.

    var c = s.charAt(i);

    if (((c < "0") || (c > "9"))) return false;

  }

  return true;

}



function stripCharsInBag(s, bag){

	var i;

    var returnString = "";

    // Search through string's characters one by one.

    // If character is not in bag, append to returnString.

    for (i = 0; i < s.length; i++){   

        var c = s.charAt(i);

        if (bag.indexOf(c) == -1) returnString += c;

    }

    return returnString;

}



function daysInFebruary (year)

{

  // February has 29 days in any year evenly divisible by four,

  // EXCEPT for centurial years which are not also divisible by 400.

  return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );

}



function DaysArray(n)

{

	for (var i = 1; i <= n; i++) {

		this[i] = 31

		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}

		if (i==2) {this[i] = 29}

   } 

   return this;

}



function trim(s) {return ((s == null) ? "" : trimRight(trimLeft(s))); }



function trimLeft(s) {

  var whitespaces = " \t\n\r";

  for(n = 0; n < s.length; n++) { if (whitespaces.indexOf(s.charAt(n)) == -1) return (n > 0) ? s.substring(n, s.length) : s; }

  return("");

}



function trimRight(s){

  var whitespaces = " \t\n\r";

  for(n = s.length - 1; n  > -1; n--) { if (whitespaces.indexOf(s.charAt(n)) == -1) return (n < (s.length - 1)) ? s.substring(0, n+1) : s; }

  return("");

}