function trim(value) {
	return value.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
};

function isEmail(email) {
	var emailRegexp = /(^[a-z0-9]([a-z0-9_\.]*)@([a-z0-9_\.]*)([.][a-z]{3})$)|(^[a-z0-9]([a-z0-9_\.]*)@([a-z0-9_\.]*)(\.[a-z]{2})(\.[a-z]{2})*$)/i;
	return emailRegexp.test(email);
};