//------------------------------- verificare email -------------------

function check_form(forma)
{
 
var x = forma; 
var departure = x.departure.value;
var destination = x.destination.value;
var str = x.email.value;
var phone = x.phone.value;
var first_name = x.first_name.value;
var last_name = x.last_name.value;

 if (departure==0)
 {
  alert("Please enter departure city !!!");
        x.departure.focus();
    return false;
 } 
 
  if (destination==0)
 {
  alert("Please enter destination city !!!");
        x.destination.focus();
    return false;
 } 

if (forma.departure_date.selectedIndex == 0)
{
alert("Please select date of departure.");

forma.departure_date.focus();
return (false);
}

if (forma.departure_month.selectedIndex == 0)
{
alert("Please select month of departure.");

forma.departure_month.focus();
return (false);
}

if (forma.nr_pax.selectedIndex == 0)
{
alert("Number of passengers is required.");

forma.nr_pax.focus();
return (false);
}

if (first_name==0)
 {
  alert("First name is required !!!");
        x.first_name.focus();
    return false;
 } 

if (last_name==0)
 {
  alert("Last name is required !!!");
        x.last_name.focus();
    return false;
 } 

if ((phone==0)&&(str==""))
 {
  alert("At least one of the contacts is required !!!");
        x.phone.focus();
    return false;
 }

var n=str.substring(str.lastIndexOf('.')+1, str.length).length;
 
 if ((str!="") && ((str.indexOf('@') == -1) || (str.indexOf('.') == -1) || (n>4) || (n<2)))
  {
    alert("Please verify email !!!");
        x.email.focus();
    return false;
  }
 else
  {
   return true;
   
  }
}