$(document).ready(function(){
$('#com').submit(function(){

adComNume = jQuery.trim($('input[name=adComNume]').val());
adComEmail = jQuery.trim($('input[name=adComEmail]').val());
adComMesaj = jQuery.trim($('textarea[name=adComMesaj]').val());
adComCaptcha = jQuery.trim($('input[name=captcha]').val());


if(adComNume == '') alert("Va rugam introduceti numele dumneavoastra");
else if(adComNume.length > 50) alert("Numele nu poate fi mai lung de 50 de caractere");
else if(adComEmail == '') alert("Va rugam introduceti adresa dumneavoastra de email");
else if(!isEmail(adComEmail)) alert("Va rugam introduceti o adresa valida de email");
else if(adComMesaj == '') alert("Va rugam introduceti mesajul dumneavoastra");
else if(adComMesaj.length < 10) alert("Mesajul dumneavoastra trebuie sa contina cel putin 10 caractere");
else if(adComCaptcha.length < 4 || adComCaptcha.length > 6) alert("Completati corect codul de securitate");
else {
var html = $.ajax({
type: 'POST',
url: 'server.php',
data: 'cod='+$('#captcha').val()+'&action=getCaptcha',
async: false
}).responseText;

if(html == '') {
alert("Completati corect codul de securitate");
document.getElementById('mcptch').src = document.getElementById('mcptch').src + '?' + (new Date()).getMilliseconds();
} else {
return true;
}
}
return false;
});
});