// create object
function formValidator()
{
// set up array to hold error messages
this.errorList = new Array;
// set up object methods
this.isEmpty = isEmpty; 
this.isNumber = isNumber; 
this.isTel = isTel; 
this.isDomesticTel = isDomesticTel; 
this.isAlphabetic = isAlphabetic; 
this.isAlphaNumeric = isAlphaNumeric; 
this.isWithinRange = isWithinRange; 
this.isEmailAddress = isEmailAddress; 
this.isChecked = isChecked; 
this.isRadioChecked = isRadioChecked;
this.isArrayChecked = isArrayChecked;
this.isSelected = isSelected;
this.raiseError = raiseError; 
this.numErrors = numErrors; 
this.displayErrors = displayErrors; 

}

// check to see if input is whitespace only or empty
function isEmpty(val)
{
if (val.match(/^s+$/) || val == "")
{
return true;
}
else
{
return false;
} 
}
// check to see if input is number
function isNumber(val)
{
if (isNaN(val))
{
return false;
}
else
{
return true;
} 
}

// check to see if input is a valid phone number
function isTel (val) {
  var tfld = val.replace(/^\s+|\s+$/g, '');// value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/  ;
  if (!tfld.match(telnr)) {
    return false;
  }
  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits<7) {
    return false;
  }
  return true;
}

// check to see if input is a valid phone number
function isDomesticTel (val) {
  var tfld = val.replace(/^\s+|\s+$/g, '');// value of field with whitespace trimmed off
  var telnr = /^\+?[0-9 ()-]+[0-9]$/  ;
  if (!tfld.match(telnr)) {
    return false;
  }
  var numdigits = 0;
  for (var j=0; j<tfld.length; j++)
    if (tfld.charAt(j)>='0' && tfld.charAt(j)<='9') numdigits++;

  if (numdigits != 10) {
    return false;
  }
  return true;
}

// check to see if input is alphabetic
function isAlphabetic(val)
{
if (val.match(/^[a-zA-Z]+$/))
{
return true;
}
else
{
return false;
} 
}
// check to see if input is alphanumeric
function isAlphaNumeric(val)
{
if (val.match(/^[a-zA-Z0-9]+$/))
{
return true;
}
else
{
return false;
} 
}
// check to see if value is within range
function isWithinRange(val, min, max)
{
if (val >= min && val <= max)
{
return true;
}
else
{
return false;
} 
}
// check to see if input is a valid email address
function isEmailAddress(val)
{
//if (val.match(/^([a-zA-Z0-9])+([.a-zA-Z0-9_-])*@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-]+)+/))
//if (val.match(/^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/)) // try this one
if (val.match(/^[^@]+@[^@.]+\.[^@]*\w\w$/))
{
return true;
}
else
{
return false;
} 
}
// check to see if form value is checked
function isChecked(obj)
{
if (obj.checked)
{
return true;
}
else
{
return false;
} 
}
// check to see if any in array of radio buttons are checked
function isRadioChecked(obj)
{
	for (i=0;i<obj.length;i++)
	{
		if (obj[i].checked) {
			return true;
		}
	}

return false;
}
// check to see if any in array of checkboxes are checked
function isArrayChecked(obj)
{
	for (i=0;i<obj.length;i++)
	{
		if (document.getElementById(obj[i]).checked) {
			return true;
		}
	}

return false;
}
// check to see if select has value
function isSelected(obj)
{
if (obj.selectedIndex != 0)
{
return true;
}
else
{
return false;
} 

}

// display all errors
// iterate through error array and print each item
function displayErrors()
{
for (x=0; x<this.errorList.length; x++)
{
alert("Error: " + this.errorList[x]);
}
}
// add an error to error list
function raiseError(msg)
{
this.errorList[this.errorList.length] = msg;
}
// return number of errors in error array
function numErrors()
{
return this.errorList.length;
}

// end object