function checkEmail(email) {
	var x = email;
	var filter  = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,6})+$/;
	if (filter.test(x)) {
		return true;
	} else {
		alert('Adresa email incorecta!');
		return false;
	}
}

function checkDate(email) {
	var x = email;
	var filter  = /^([0-9])+\-([0-9])+\-([0-9])+$/;
	if (filter.test(x)) {
		return true;
	} else {
		return false;
	}
}


function isNull(value) {
	if (value==null) return true;
	if (value.length == 0) return true;
	return false;
}