function validateEmail(emailAddress) {
   return /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/.test(emailAddress);
}	
function isValidUSZip(sZip) {
	return /^\d{5}(-\d{4})?$/.test(sZip);
}
function isValidPhone(number){
	return /^\(?[\d]{3}\)?[\s-]?[\d]{3}[\s-]?[\d]{4}$/.test(number);
}
function isInteger(number){
	return /^-?\d+$/.test(number);
}