function validateEmail(emailAddress){
	
	var error="";
	var emailFilter=/^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
<!--	we’re forbidding the following: ( ) < > [ ] , ; : \ / "-->	
	var illegalChars= /[\(\)\<\>\,\;\:\\\/\"\[\]]/

	if (!(emailFilter.test(emailAddress))) { 
       error = "yes";
	}

	if (emailAddress.match(illegalChars)) {
       error = "yes";
	}

	if(error != ""){
		return false;
	}
	return true;
}

function isInteger(s){ 
	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;
		}
// All characters are numbers.
	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++)
	{ 
	// Check that current character isn't whitespace.
	var c = s.charAt(i);
	if (bag.indexOf(c) == -1) returnString += c;
	}

	return returnString;
}

function validatePhone(phoneNumber){

<!--This function calls isInteger() and stripCharsInBag() functions-->

	var strPhone = phoneNumber;

	var phoneNumberDelimiters = "()- ";
// characters which are allowed in international phone numbers
// (a leading + is OK)
	var validWorldPhoneChars = phoneNumberDelimiters + "+";
	var minDigitsInIPhoneNumber = 10;
	
	
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}

function validateDate(phoneNumber){

<!--This function calls isInteger() and stripCharsInBag() functions-->

	var strPhone = phoneNumber;

	var phoneNumberDelimiters = "-";
// characters which are allowed in international phone numbers
// (a leading + is OK)
	var validWorldPhoneChars = phoneNumberDelimiters + " ";
	var minDigitsInIPhoneNumber = 8;
	
	
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
}