function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}

function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}


function Mostra(x)
{
  if (document.getElementById(x)) 
	  document.getElementById(x).style.display = '';
}


function Nascondi(x)
{
  if (document.getElementById(x)) 
    document.getElementById(x).style.display = 'none';
}


function MostraNascondi(x)
{
  if (document.getElementById(x)) 
  {
    if (document.getElementById(x).style.display == '')
    {
    	document.getElementById(x).style.display = 'none';
    }
    else
    {
    	document.getElementById(x).style.display = '';
    }
  }
}

var isNS4 = (document.layers) ? true : false;
var isIE4 = (document.all && !document.getElementById) ? true : false;
var isIE5 = (document.all && document.getElementById) ? true : false;
var isNS6 = (!document.all && document.getElementById) ? true : false;

function switchDiv(strDivName,bolVisible)
{
	if (isNS4)
	{
	 objElement = document.layers[strDivName];
	}
	else if (isIE4)
	{
	 objElement = document.all[strDivName];
	}
	else if (isIE5 || isNS6)
	{
	 objElement = document.getElementById(strDivName);
	}
	
	if(isNS4){
	   if(!bolVisible) {
		 objElement.visibility ="hidden"
	   } else {
		 objElement.visibility ="visible"
	   }     
	 }else{
	   if(!bolVisible) {
		 objElement.style.visibility = "hidden";
	   } else {
		 objElement.style.visibility = "visible";
	   }
	}
}



function MM_swapImgRestore() { 
  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() { 
  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) { 
  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 && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { 
  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];}
}