// Eugene Jerusalimov, 2004
function checkEmail( email ) {
	//email validation regexp
	email_pattern = '^[_a-zA-Z0-9-]+(\.[_a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)*(\.[a-zA-Z]{2,4})$';

	if( window.RegExp ) {
		re = new RegExp(email_pattern);
		if( !re.test( email ) )
			return false;
		else
			return true;
	}

	return true;
}