function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}

function Trim(stringa){
  var str=''
  str = stringa.replace(/^ +/,'')
  str = str.replace(/ +$/,'')
  return str
}

function VerUser(stringa)
{
	var allValid = true;
	var checkOK = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ. ";
	
	for (i = 0; i < stringa.length; i++)
	{
		ch = stringa.charAt(i);
		for (j = 0; j < checkOK.length; j++)
		if (ch == checkOK.charAt(j))
			break;
		if (j == checkOK.length)
		{
			allValid = false;
			break;
		}
	}
	if (!allValid)
		return (false);
		
	return (true);
}

function Modulo()
{
	var user = document.forms["form_login"]["username"].value;
	var pass = document.forms["form_login"]["password"].value;

	user = Trim(user);
	pass = Trim(pass);

	if(user == "" || user == "undefined")
	{
		alert("ERROR\n\nField \"Username\" is empty");
		document.forms["form_login"]["username"].focus();
		return false;
	}
	else
	{
		if(!VerUser(user))
		{
			alert("ERRORE\n\nField \"Username\" is not correct");
			document.forms["form_login"]["username"].focus();
			return (false);
		}
	}

	if(pass == "" || pass == "undefined")
	{
		alert("ERROR\n\nField \"Password\" is empty");
		document.forms["form_login"]["password"].focus();
		return false;
	}
	else
	{
		if(!VerUser(pass))
		{
			alert("ERRORE\n\nIl campo obbligatorio \"Password\" is not correct");
			document.forms["form_login"]["password"].focus();
			return (false);
		}
	}
}