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;
  }
  return result;
}



function IsValidTime(timeStr,fieldLabel,required) {
// Checks if time is in HH:MM:SS AM/PM format.
// The seconds and AM/PM are optional.
var result = true;
var timePat = /^(\d{1,2}):(\d{2})(:(\d{2}))?(\s?(AM|am|PM|pm))?$/;

if (timeStr.value != ""){
var matchArray = timeStr.value.match(timePat);
	if (matchArray == null) {
	alert('Time is not in a valid format in the "' + fieldLabel + '" field. Please use the hh:mm AM/PM format');
	timeStr.focus();
	return false;
}
hour = matchArray[1];
minute = matchArray[2];
second = matchArray[4];
ampm = matchArray[6];

if (second=="") { second = null; }
if (ampm=="") { ampm = null }

if (hour < 1  || hour > 12) {
	alert("Hour must be between 1 and 12.");
	timeStr.focus();
	result = false;
	}
if (minute<0 || minute > 59) {
	alert ("Minutes must be between 0 and 59.");
	timeStr.focus();
	result = false;
}
if (second != null && (second < 0 || second > 59)) {
	alert ("Second must be between 0 and 59.");
	timeStr.focus();
	result = false;
}
}
return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function TimeSpent(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field. This Value can be 0 if an Overtime Amount has been entered');
		formField.focus();
		result = false;
	}
	
	return result;
}

function OptionalRequired(formFieldO,formFieldR,fieldLabel)
{
	var result = true;
	
	if (formFieldO.value != "" && formFieldR.value == "")
	{
		alert('Please enter a value for the "' + fieldLabel +'" field.');
		formFieldR.focus();
		result = false;
	}
	return result;
}

function allDigits(str)
{
	return inValidCharSet(str,"0123456789");
}

function inValidCharSet(str,charset)
{
	var result = true;

	// Note: doesn't use regular expressions to avoid early Mac browser bugs	
	for (var i=0;i<str.length;i++)
		if (charset.indexOf(str.substr(i,1))<0)
		{
			result = false;
			break;
		}
	
	return result;
}

function IsNumeric(formField,fieldLabel)
{
	var result = true;
	if (isNaN(formField.value)) {
		alert('Please enter only numerical values (x.x) into the "'  + fieldLabel + '" field.');
		formField.focus();
		result = false;
	}
	  return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please enter a complete email address in the form: yourname@yourdomain.com");
		formField.focus();
		result = false;
	}
   
  return result;

}

function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!allDigits(formField.value))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}


function validInt(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if ((result) && (formField.value != ""))
 	{
 		var num = parseInt(formField.value,10);
 		if (isNaN(num))
 		{
 			alert('Please enter a number for the "' + fieldLabel +'" field.');
			formField.focus();		
			result = false;
		}
	} 
	
	return result;
}

function validRadio(formField,fieldLabel) {
	var result = true;	
		myOption = -1;
		for (i=0; i<formField.length; i++) {
		if (formField[i].checked) {
		myOption = i;
		}
		}
		if (myOption == -1) {
		alert('You must check an option in the "' + fieldLabel +'" field.');
		var result = false;	
		}
		return result;
}
//Checks to see if either a text field has a value (formfield1) or that a checkbox has been checked (formfield2)
function validInputOrCheckbox(formField1,fieldLabel1,formField2,fieldLabel2) {
	var result = true;
	
	if ((formField1.value == "") && (formField2.checked == false))
	{
		alert('Please enter a value for either "' + fieldLabel1 +'" or "' + fieldLabel2 +'" field.');
		formField1.focus();
		result = false;
	}
	if ((formField1.value != "") && (formField2.checked == true))
	{
		alert('Please enter a value for only one of the following fields:"' + fieldLabel1 +'" or "' + fieldLabel2 +'" fields.');
		formField1.focus();
		result = false;
	}
		
	return result;
}
function validPhone(formField,fieldLabel) {
	var result = true;
	var GoodChars = "0123456789()-+ "
	var i = 0
	for (i =0; i <= formField.value.length -1; i++) {
		if (GoodChars.indexOf(formField.value.charAt(i)) == -1) {
			alert('Please the value entered in the "' + fieldLabel +'" field is not a vaild phone number.');
			result = false;
		} 
	} 
	return result;
}

function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0],10);
  			var day = parseInt(elems[1],10);
 			var year = parseInt(elems[2],10);
			result = allDigits(elems[0]) && (month > 0) && (month < 13) &&
					 allDigits(elems[1]) && (day > 0) && (day < 32) &&
					 allDigits(elems[2]) && ((elems[2].length == 2) || (elems[2].length == 4));
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date in the format MM/DD/YYYY for the "' + fieldLabel +'" field.');
			formField.focus();		
		}
	} 
	
	return result;
}