function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
	return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
	return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}

function validare_contact(frm) {
	if (frm.firma.value == "") {
		alert("Va rugam sa completati FIRMA");
        return false;
	}
	else if (frm.persoana.value == "") {
		alert("Va rugam sa completati PERSOANA DE CONTACT");
        return false;
	}
	else if (frm.telefon.value == "") {
		alert("Va rugam sa completati TELEFON");
        return false;
	}
    else if (!isValidEmail(frm.email.value)) {
        alert("Va rugam sa completati ADRESA DE E-MAIL VALIDA");
        return false;
    }
	else {
    	return true;
	}
}

function validare_contact2(frm) {
	if (frm.nume.value == "") {
		alert("Va rugam sa completati numele");
        return false;
	}
    else if (!isValidEmail(frm.email.value)) {
        alert("Va rugam sa specificati o adresa de e-mail valida");
        return false;
    }
	else if (frm.postDorit.value == "") {
        alert("Va rugam sa specificati postul dorit");
        return false;
    }
	else if (frm.mesaj.value == "") {
		alert("Va rugam sa scrieti un mesaj");
        return false;
	}
	else
	{
    	return true;
	}
}

function validare_contact3(frm) {
	if (frm.firma.value == "") {
		alert("Va rugam sa completati NUME (Companie)");
        return false;
	}
	else if (frm.persoana.value == "") {
		alert("Va rugam sa completati PERSOANA DE CONTACT");
        return false;
	}
	else if (frm.dateContact.value == "") {
		alert("Va rugam sa completati DATE CONTACT");
        return false;
	}
    else if (frm.tipEchipament.value == "") {
		alert("Va rugam sa completati TIP ECHIPAMENT");
        return false;
	}
	else if (frm.mesaj.value == "") {
		alert("Va rugam sa completati DESCRIERE PROBLEMA");
        return false;
	}
	else {
    	return true;
	}
}