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_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];}}
}

// Invia un'E-Mail all'indirizzo selezionato
function MailTo(address) {
	window.location="mailto:" + address;
}

// Da' fuoco al controllo selezionato
function SetFocus(controlID) {
	var el=document.forms[0].elements;
	for (i=0; i<el.length; i++) {
		if (el.item(i).id.indexOf('_'+controlID) != -1) {
			el.item(i).focus();
			break;
		}
	}
}

// Aggiusta la combo IdDay in base alle selezioni delle combo IdYear e IdMonth
function SetDays(idYear, idMonth, idDay) {
    var years = document.getElementById(idYear);
    var months = document.getElementById(idMonth);
    var days = document.getElementById(idDay);
    var daysPerMonth = new Array(31, ((years.value % 4 == 0 && years.value % 100 != 0) || years.value %400 == 0 ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
	selDayIdx = days.selectedIndex;
    days.options.length = 0;
    for (i = 0; i < daysPerMonth[months.value - 1]; i++) {
      days.options.length = days.options.length + 1;
      days.options[i].value = i + 1;
      days.options[i].text = i + 1;
    }
    if (selDayIdx != -1) 
      days.selectedIndex = (selDayIdx < daysPerMonth[months.value - 1]) ? selDayIdx : (daysPerMonth[months.value - 1] - 1);
	else
      days.selectedIndex = 0;
}

function clickButton(e, buttonid)
{
	var evt = e ? e : window.event;
    var bt = document.getElementById(buttonid);
    if (bt)
    { 
		if (evt.keyCode == 13)
		{ 
			bt.click(); 
			return false; 
        } 
	} 
}

function disable(element, form)
{	   
	document.getElementById(element).disabled = true;    
	document.getElementById(form).Submit(); 	
}

// funzione con cui si disabilita la pressione doppia di un tasto. passando l'elemento da disabilitare 
// (il bottone) e la form da cui si deve fare il submit alla pressione del tasto esso viene reso invisibile.
function invisible(element, form)
{
    document.getElementById(element).style.visibility = "hidden";
    document.getElementById(form).Submit();    
}

function enable(par)
{
    document.getElementById(par).disabled = false;
}