var mPrefix = "Bisogna che tu inserisca un valore per il campo "
var mSuffix = ". E' obbligatorio; inseriscilo, vai!"
// whitespace characters
var whitespace = " \t\n\r";
var defaultEmptyOK = false

//avvisa quando un campo ?vuoto
function warnEmpty (theField, s)
{theField.focus()
alert(mPrefix + s + mSuffix)
return false}

//jump del menu' a cascata
function MM_jumpMenu(targ,selObj,restore){ //v3.0
eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
if (restore) selObj.selectedIndex=0;}

//serve a aprire una finestra popup
function openWin(theURL,winName,features) {
window.open(theURL,winName,features);}

// Check whether string s is empty.
function isEmpty(s)
{return ((s == null) || (s.length == 0))
}

function tooLong(s,l)
{return (s.length > l)
  }
// Returns true if string s is empty or 
// whitespace characters only.

function isURL(some_text)
{var the_first_seven = some_text.substring(0,7);
the_first_seven = the_first_seven.toLowerCase();
if ((the_first_seven != 'http://') || (some_text == the_first_seven)) {
return false;} 
else { return true;  }}

function isWhitespace(s)
{var i;
// Is s empty?
if (isEmpty(s)) return true;
// Search through string's characters one by one
// until we find a non-whitespace character.
// When we do, return false; if we don't, return true.
for (i = 0; i < s.length; i++)
{// Check that current character isn't whitespace.
var c = s.charAt(i);
if (whitespace.indexOf(c) == -1) return false;    }
// All characters are whitespace.
return true;}

// Check whether radio is empty.
function isEmptyRadio(radio)
{for (i=0;i<radio.length;i++){
if (radio[i].checked==true) return false;}
return true;}

function isInt(s){
if (isWhitespace(s)) return false;
var chk = /^[0-9]+$/;
return chk.test(s)
		 		 }

// isEmail (STRING s [, BOOLEAN emptyOK])
function isEmail (s)
{if (isEmpty(s)) 
if (isEmail.arguments.length == 1) return defaultEmptyOK;
else return (isEmail.arguments[1] == true);
// is s whitespace?
if (isWhitespace(s)) return false;
// there must be >= 1 character before @, so we
// start looking at character position 1 
// (i.e. second character)
var i = 1;
var sLength = s.length;
// look for @
while ((i < sLength) && (s.charAt(i) != "@"))
{ i++}
if ((i >= sLength) || (s.charAt(i) != "@")) return false;
else i += 2;
// look for .
while ((i < sLength) && (s.charAt(i) != "."))
{ i++ }
// there must be at least one character after the .
if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
else return true;
}

function troppolungo(s, lunghezza)
{if (s.length > lunghezza) return true;
return false;}

function okdata(data, str)
 {
if ((!isEmpty('gg_' + data)) && (!isEmpty('mm_' + data)) && (!isEmpty('aa_' + data))) return true;
if (str==1) return false;
if ((isEmpty('gg_' + data)) && (isEmpty('mm_' + data)) && (isEmpty('aa_' + data))) return true;
return false;
   }