function isInteger(inputVal) {
  inputStr = inputVal.toString()
  for (var i = 0; i < inputStr.length;i++)
  {
	var oneChar = inputStr.charAt(i)
	if (oneChar < "0" || oneChar > "9" )
	{
	  if (oneChar != "-") 
	  {
		return false
	  }
	}
  }
  return true
}

function isEmpty(inputVal) {
  inputStr = inputVal.toString()
  if (inputStr.length == "0") 
  {
	return false
  }
  return true
}


function isChar(inputVal) {
  inputStr = inputVal.toString()
  inputStr = inputStr.toUpperCase()
  for (var i = 0; i < inputStr.length;i++)
  {
	var oneChar = inputStr.charAt(i)
	if (oneChar < "A" || oneChar > "Z" )
	{
	  if(oneChar != "-" && oneChar != ".")
	  {
		return false
	  }
	}
  }
  return true
}

function isFloat(inputVal) {
  inputStr = inputVal.toString()
  for (var i = 0; i < inputStr.length;i++)
  {
	var oneChar = inputStr.charAt(i)
	if (oneChar < "0" || oneChar > "9" )
	{
	  if(oneChar != "-" && oneChar != ".")
	  {
		return false
	  }
	}
  }
  return true
}

// check the entered month for too high a value
function checkMonthLength(mm,dd) {
	var months = new Array("","January","February","March","April","May","June","July","August","September","October","November","December")
	if ((mm == 4 || mm == 6 || mm == 9 || mm == 11) && dd > 30) {
		alert(months[mm] + " has only 30 days.")
		return false
	} else if (dd > 31) {
		alert(months[mm] + " has only 31 days.")
		return false
	}
	return true
}

// check the entered February date for too high a value 
function checkLeapMonth(mm,dd,yyyy) {
	if (yyyy % 4 > 0 && dd > 28) {
		alert("February of " + yyyy + " has only 28 days.")
		return false
	} else if (dd > 29) {
		alert("February of " + yyyy + " has only 29 days.")
		return false
	}
	return true
}

// date field validation (called by other validation functions that specify minYear/maxYear)
function isDate(inputStr) {
	var delim1 = inputStr.indexOf("/")
	var delim2 = inputStr.lastIndexOf("/")
	if (delim1 != -1 && delim1 == delim2) {
		// there is only one delimiter in the string
		alert("The date entry is not in an acceptable format.\n\nYou can enter dates in the following formats: mmddyyyy, mm/dd/yyyy, or mm-dd-yyyy.  (If the month or date data is not available, enter \'01\' in the appropriate location.)")
		return false
	}
	if (delim1 != -1) {
		// there are delimiters; extract component values
		var dd = parseInt(inputStr.substring(0,delim1),10)
		var mm = parseInt(inputStr.substring(delim1 + 1,delim2),10)
		var yyyy = parseInt(inputStr.substring(delim2 + 1, inputStr.length),10)
	} else {
		// there are no delimiters; extract component values
		var dd = parseInt(inputStr.substring(0,2),10)
		var mm = parseInt(inputStr.substring(2,4),10)
		var yyyy = parseInt(inputStr.substring(4,inputStr.length),10)
	}
	if (isNaN(mm) || isNaN(dd) || isNaN(yyyy)) {
		// there is a non-numeric character in one of the component values
		alert("The date entry is not in an acceptable format.")
		
		return false
	}
	if (mm < 1 || mm > 12) {
		// month value is not 1 thru 12
		alert("Months must be entered between the range of 01 (January) and 12 (December).")
		
		return false
	}
	if (dd < 1 || dd > 31) {
		// date value is not 1 thru 31
		alert("Days must be entered between the range of 01 and a maximum of 31 (depending on the month and year).")
		
		return false
	}

	if (!checkMonthLength(mm,dd)) {
		return false
	}
	if (mm == 2) {
		if (!checkLeapMonth(mm,dd,yyyy)) {
			return false
		}
	}

	return true
}