var win = null;
function zoom(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',toolbar=0,location=0,directories=0,menuBar=0,scrollbars=0,resizable=0'
win = window.open(mypage,myname,settings)
if(win.window.focus){win.window.focus();}
}
ok=0; old_what="non";
function show(what){
  if((old_what != "non") && (what != old_what)){
 ok=1;

 old_what.style.display="none";
 what.style.display="";
  }else
  {
 if(ok){
  ok=0;
  what.style.display="none";
 }else
 {
  ok=1;
  what.style.display="";
 }
  }
  old_what=what;
}
function controllo(){
with(document.form) {
if(date_from.value=="") {
alert("Errore nel campo DATA CHECK IN");
//date_from.focus();
return false;
}
if(date_to.value=="") {
alert("Errore nel campo DATA CHECK OUT");
return false;
} 
if(date_to.value==date_from.value) {
alert("Errore nel campo DATA CHECK OUT");
return false;
}
if(date_to.value<date_from.value) {
alert("Errore nel campo DATA CHECK OUT");
return false;
}


} // document.form



} // controllo 
function isEmail(string) {
if (string.search(/^\w+((-\w+)|(\.\w+))*\@\w+((\.|-)\w+)*\.\w+$/) != -1)
return 1;
else
return 0;
}
function verifica(){
with(document.form) {

if(nome.value == "") {
alert("Compilare il campo NOME");
nome.focus();
return false;
}
if(cognome.value == "") {
alert("Compilare il campo COGNOME");
cognome.focus();
return false;
}
if(mail.value == "") {
alert("Compilare il campo EMAIL");
mail.focus();
return false;
}

if(mail_v.value == "") {
alert("Confermare il campo EMAIL");
mail_v.focus();
return false;
}

if ( isEmail(mail.value) == 0 ) {
alert("Inserire un indirizzo EMAIL valido")
mail.focus();
return false}

if(mail.value != mail_v.value) {
alert("Errore nella verifica EMAIL");
mail_v.focus();
return false;
}



} // document.form



} // verifica