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

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

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

function valuecheck(str)
{
	return inValidCharSet(str,"qwertyuiopasdfghjklmnbvcxzQWERTYUIOPLKJHGFDSAZXCVBNM,./[])#(1234567890<>-_ ");
}
function aplhacheck(str)
{
	return inValidCharSet(str,"qwertyuiopasdfghjklmnbvcxzQWERTYUIOPLKJHGFDSAZXCVBNM ");
}
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 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 validValue(formField,fieldLabel,required)
{
	var result = true;

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

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!aplhacheck(formField.value))
 		{
 			alert('Please enter valid value for the "' + fieldLabel +'" field.');
			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 validMoney(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		if (!moneycheck(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)
 	{
 		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 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;
}

function validYear(formField)
{
	var result = true;

	  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			
 			var year = parseInt(elems[2],10);
 			result= allDigits(year < 90 || year < 1990);
 		}
 		
  		if (!result)
 		{
 			alert('Please enter a date above 18 year in Date of Birth Field');
			formField.focus();		
		}
	} 
	
	return result;
}


function validButton(formField,fieldLabel) {
// validate myradiobuttons
myOption = -1;
for (i=0; i<formField.length; i++) {
if (formField[i].checked) {
myOption = i;
}
}
if (myOption == -1) {
alert("You must select a " + fieldLabel);
return false;
}
else {
return true;
}
}


function isValidCardNumber (strNum) 
{
   var nCheck = 0;
   var nDigit = 0;
   var bEven  = false;
   
   for (n = strNum.length - 1; n >= 0; n--) 
   {
      var cDigit = strNum.charAt (n);
      if (isDigit (cDigit))
      {
         var nDigit = parseInt(cDigit, 10);
         if (bEven)
         {
            if ((nDigit *= 2) > 9)
               nDigit -= 9;
         }
         nCheck += nDigit;
         bEven = ! bEven;
      }
      else if (cDigit != ' ' && cDigit != '.' && cDigit != '-')
      {
         return false;
      }
   }
   return (nCheck % 10) == 0;
}
function isDigit (c)
{
   var strAllowed = "1234567890";
   return (strAllowed.indexOf (c) != -1);
}
function isCardTypeCorrect (strNum, type)
{
   var nLen = 0;
   for (n = 0; n < strNum.length; n++)
   {
      if (isDigit (strNum.substring (n,n+1)))
         ++nLen;
   }
   
   if (type == 'Visa')
      return ((strNum.substring(0,1) == '4') && (nLen == 13 || nLen == 16));
   else if (type == 'Amex')
      return ((strNum.substring(0,2) == '34' || strNum.substring(0,2) == '37') && (nLen == 15));
   else if (type == 'Master Card')
      return ((strNum.substring(0,2) == '51' || strNum.substring(0,2) == '52'
              || strNum.substring(0,2) == '53' || strNum.substring(0,2) == '54'
              || strNum.substring(0,2) == '55') && (nLen == 16));
   else
      return false;
   
}

 function vdate(dfield)
            {
                if(dfield.value!="")
                        {
                           var input=dfield.value;
                           var validformat=/^\d{2}\/\d{2}\/\d{4}$/ //Basic check for format validity
                            var returnval=false
                            if (!validformat.test(input))
                            alert("Invalid Date Format. Please correct(MM/DD/YYYY) and submit again.")
                            else{ //Detailed check for valid date ranges
                            var monthfield=input.split("/")[0]
                            var dayfield=input.split("/")[1]
                            var yearfield=input.split("/")[2]
                            var dayobj = new Date(yearfield, monthfield-1, dayfield)
                            if ((dayobj.getMonth()+1!=monthfield)||(dayobj.getDate()!=dayfield)||(dayobj.getFullYear()!=yearfield))
                            alert("Invalid Day, Month, or Year range detected. Please correct and submit again.")
                            else
                            returnval=true
                            }
                            if (returnval==false) 
                            dfield.focus();
                            return returnval
                        } 
            }
            
function CurrencyFormatted(amount)
                {
	                var i = parseFloat(amount);
	                if(isNaN(i)) { i = 0.00; }
	                var minus = '';
	                if(i < 0) { minus = '-'; }
	                i = Math.abs(i);
	                i = parseInt((i + .005) * 100);
	                i = i / 100;
	                s = new String(i);
	                if(s.indexOf('.') < 0) { s += '.00'; }
	                if(s.indexOf('.') == (s.length - 2)) { s += '0'; }
	                s = minus + s;	        
	                return s;
                }