function IsNumeric(sText){

   var ValidChars = "0123456789.,";
   var IsNumber=true;
   var Char;

   for (i = 0; i < sText.length && IsNumber == true; i++) {
      Char = sText.charAt(i);
      if (ValidChars.indexOf(Char) == -1){
         IsNumber = false;
      }
   }
   return IsNumber;

}




function echeck(str) {
  var at="@"
  var dot="."
  var lat=str.indexOf(at)
  var lstr=str.length
  var ldot=str.indexOf(dot)
  if (str.indexOf(at)==-1){
     alert("Adresa de email incorecta")
     return false
  }
  if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
     alert("Adresa de email incorecta")
     return false
  }
  if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
      alert("Adresa de email incorecta")
      return false
  }
   if (str.indexOf(at,(lat+1))!=-1){
      alert("Adresa de email incorecta")
      return false
   }
   if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
      alert("Adresa de email incorecta")
      return false
   }
   if (str.indexOf(dot,(lat+2))==-1){
      alert("Adresa de email incorecta")
      return false
   }
   if (str.indexOf(" ")!=-1){
      alert("Adresa de email incorecta")
      return false
   }
   return true
}


function validareEmail() {

  if (document.getElementById('user_email').value == '') {
    alert('Va rugam sa completati campul "Email"');
    document.getElementById('user_email').focus();
    return false;
  }

  if (echeck(document.getElementById('user_email').value)==false){
    document.getElementById('user_email').value="";
    document.getElementById('user_email').focus();
    return false;
  }
   return true
}


function validareCereInformatii() {

        if (document.getElementById('user_name').value == '') {
                alert('Va rugam sa completati numele');
                document.getElementById('user_name').focus();
                return false;
        }
       if (document.getElementById('user_email').value == '') {
                alert('Va rugam sa completati adresa de email');
                document.getElementById('user_email').focus();
                return false;
        }
       if (echeck(document.getElementById('user_email').value)==false){
               document.getElementById('user_email').value="";
               document.getElementById('user_email').focus();
               return false;
       }

    return true;
}


function validareRezervareCamera() {

        if (document.getElementById('name').value == '') {
                alert('Va rugam sa completati numele');
                document.getElementById('name').focus();
                return false;
        }
       if (document.getElementById('phone').value == '') {
                alert('Va rugam sa completati numarul de telefon');
                document.getElementById('phone').focus();
                return false;
        }

       if (document.getElementById('email').value == '') {
                alert('Va rugam sa completati adresa de email');
                document.getElementById('email').focus();
                return false;
        }
       if (echeck(document.getElementById('email').value)==false){
               document.getElementById('email').value="";
               document.getElementById('email').focus();
               return false;
       }

        if (document.getElementById('date_in').value == '') {
                alert('Va rugam sa selectati data de sosire');
                document.getElementById('date_in').focus();
                return false;
        }

       if (document.getElementById('number_of_night').value == '') {
                alert('Va rugam sa selectati numarul de nopti');
                document.getElementById('number_of_night').focus();
                return false;
        }
       if (document.getElementById('room_type_id').value == '') {
                alert('Va rugam sa selectati tipul de camera');
                document.getElementById('room_type_id').focus();
                return false;
        }

       if (document.getElementById('number_of_rooms').value == '') {
                alert('Va rugam sa selectati numarul de camere');
                document.getElementById('number_of_rooms').focus();
                return false;
        }
    return true;
}

function validareEmail1(camp) {

  if (document.getElementById(camp).value == '') {
    alert('Va rugam sa completati campul "Email"');
    document.getElementById(camp).focus();
    return false;
  }

  if (echeck(document.getElementById(camp).value)==false){
    document.getElementById(camp).value="";
    document.getElementById(camp).focus();
    return false;
  }
   return true
}

function validareAbonare() {

        if (document.getElementById('user_last_name').value == '') {
                alert('Va rugam sa completati numele');
                document.getElementById('user_last_name').focus();
                return false;
        }
        if (document.getElementById('user_first_name').value == '') {
                alert('Va rugam sa completati prenumele');
                document.getElementById('user_first_name').focus();
                return false;
        }


        if (document.getElementById('user_email').value == '') {
                alert('Va rugam sa completati adresa de email');
                document.getElementById('user_email').focus();
                return false;
        }
        if (echeck(document.getElementById('user_email').value)==false){
               document.getElementById('user_email').value="";
               document.getElementById('user_email').focus();
               return false;
        }

    return true;
}

function validareButonRadioSelectat (checkbox_id, nr_iteratii, mesaj)
{

  valoare=true;

  for (counter = 0; counter < nr_iteratii; counter++)
     {
       if(document.getElementById(checkbox_id+counter) != undefined) {
         if(document.getElementById(checkbox_id+counter).checked==true)
        valoare=false;
         }
     }

  if(valoare == true) {
  alert(mesaj);
    return false;
  }

}