// function to check for alphanumeric in a string
function checkAlphaNumerics(checkString) {
	var alpha = /^[A-Za-z0-9]$/;
	if(checkString!= null && checkString!= "") {
		for(var i = 0; i < checkString.length; i++) {
			if (!checkString.charAt(i).match(alpha)) {
				return false;
			}
		}
	} else {
		return false;
	}
		return true;
}

function checkEmail(email) {
	var filter = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
	return filter.test(email);
}