var actualRoll;

function mCatOver(o)
{
	o.className='menuOn';

	var els = document.getElementsByName('roll_'+actualRoll);
	for (i=0; i <els.length; i++)
		els[i].className = 'rolloverOff';

	var els = document.getElementsByName('roll_'+o.getAttribute('id'));
	for (i=0; i <els.length; i++)
		els[i].className = 'rolloverOn';

	actualRoll = o.getAttribute('id');
}

function mSubCatOver(o)
{
	o.className='menuOnSub';

	var els = document.getElementsByName('roll_'+actualRoll);
	for (i=0; i <els.length; i++)
		els[i].className = 'rolloverOff';

	var els = document.getElementsByName('roll_'+o.getAttribute('id'));
	for (i=0; i <els.length; i++)
		els[i].className = 'rolloverOn';

	actualRoll = o.getAttribute('id');
}
// --------------------------------------------------------------------------

function mOver (o) { o.className='menuOn'; }
function mOut (o) { o.className='menuOff'; }
function mOverSub (o) { o.className='menuOnSub';}
function mOutSub (o) { o.className='menuOffSub';}

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];}}
}

// ---------------------

function toggleVisibility(id, mode) {
  var NNtype = (mode == "show") ? mode : "hidden";
  var IEtype = (mode == "show") ? "visible" : "hidden";
  var WC3type = (mode == "show") ? "visible" : "hidden";
  if (document.getElementById) {
    eval("document.getElementById(id).style.visibility = \"" + WC3type + "\"");
  } else {
    if (document.layers) {
      document.layers[id].visibility = NNtype;
    } else {
      if (document.all) {
      eval("document.all." + id + ".style.visibility = \"" + IEtype + "\"");
    }
  }
 }
}
function vedi(numero) {
	switch(numero) {
	case 1: 
		toggleVisibility('Layer1', 'show');
		toggleVisibility('Layer2', 'hide');
		toggleVisibility('Layer3', 'hide');
		break;
	case 2:
		toggleVisibility('Layer1', 'hide');
		toggleVisibility('Layer2', 'show');
		toggleVisibility('Layer3', 'hide');
		break;
	case 3:
		toggleVisibility('Layer1', 'hide');
		toggleVisibility('Layer2', 'hide');
		toggleVisibility('Layer3', 'show');
		break;
	}
}