function menuOver(id) {
	new Effect.Move(id, { x: 0, y: -8, mode: 'absolute', duration: 0.2});
}

function menuOut(id) {
	new Effect.Move(id, { x: 0, y: 0, mode: 'absolute', duration: 0.3});
}

function isMail(email) {
	var expressionReguliere = new RegExp("^[a-zA-Z0-9_-].+@[a-zA-Z0-9-]{2,}[.][a-zA-Z]{2,4}$");
	return expressionReguliere.test(email);
}