function contact(lang) {

	var error = '';
	var filter = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i

	var denumire = $('#denumire').val();
	var pc = $('#pc').val();
	var tel = $('#tel').val();
	var mail = $('#mail').val();
	var oras = $('#oras').val();

	if(denumire.length==0) error += 'Va rugam introduceti denumire firmei dvs.\n';
	if(pc.length==0) error += 'Va rugam introduceti numele persoanei de contact.\n';
	if(tel.length==0) error += 'Va rugam introduceti numarul dvs. de telefon.\n';
	else if(tel.length>0 && (tel.length<6 || tel.length>12 || isNaN(tel))) error += 'Va rugam introduceti un numar de telefon corect.\n';
	if(mail.length==0) error += 'Va rugam introduceti adresa dvs. de e-mail.\n';
	else if(mail.length>0 && !filter.test(mail)) error += 'Va rugam introduceti o adresa de e-mail valida.\n';

	if(error.length==0) {

		$.post('ajax.php?lang='+lang,
			{
				denumire: denumire,
				pc: pc,
				tel: tel,
				mail: mail,
				oras: oras,
				lang: lang
			}, function(data) {
				alert(data);
				
				$('#denumire').val('');
				$('#pc').val('');
				$('#tel').val('');
				$('#mail').val('');
				$('#oras').val('');
			}
		);

	} else {
		alert(error);
	}

}