/* ---------------------> Parte per lo scroll <-----------------------------------------	*/
//Funzione per scrolling 
function lib_bwcheck(){ //Browsercheck (needed)
	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.opera5=this.agent.indexOf("Opera")>-1
	/*this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0;
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie7=(this.ver.indexOf("MSIE 7")>-1 && this.dom && !this.opera5)?1:0;*/
		this.ieAll=(this.ver.indexOf("MSIE")>-1 && this.dom && !this.opera5)?1:0;
		this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ieAll
	this.mac=this.agent.indexOf("Mac")>-1
	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0;
	this.ns4=(document.layers && !this.dom)?1:0;
	/*this.bw=(this.ie7 || this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5)*/
	this.bw=(this.ieAll || this.ie4 || this.ns4 || this.ns6 || this.opera5)
	return this
}
var bw=new lib_bwcheck()

//If you want it to move faster you can set this lower, it's the timeout:
var speed = 30

//Sets variables to keep track of what's happening
var loop, timer

//Object constructor
function makeObj(obj,nest){
nest=(!nest) ? "":'document.'+nest+'.'
this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0;
this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0;
this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight
this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight
this.up=goUp;this.down=goDown;
this.moveIt=moveIt; this.x=0; this.y=0;
this.obj = obj + "Object"
eval(this.obj + "=this")
return this
}

// A unit of measure that will be added when setting the position of a layer.
var px = bw.ns4||window.opera?"":"px";

function moveIt(x,y){
this.x = x
this.y = y
this.css.left = this.x+px
this.css.top = this.y+px
}

//Makes the object go up
function goDown(move){
if (this.y>-this.scrollHeight+oCont.clipHeight){
this.moveIt(0,this.y-move)
if (loop) setTimeout(this.obj+".down("+move+")",speed)
}
}
//Makes the object go down
function goUp(move){
if (this.y<0){
this.moveIt(0,this.y-move)
if (loop) setTimeout(this.obj+".up("+move+")",speed)
}
}

//Calls the scrolling functions. Also checks whether the page is loaded or not.
function scroll(speed){
if (scrolltextLoaded){
loop = true;
if (speed>0) oScroll.down(speed)
else oScroll.up(speed)
}
}

//Stops the scrolling (called on mouseout)
function noScroll(){
loop = false
if (timer) clearTimeout(timer)
}

//Makes the object
var scrolltextLoaded = false
function scrolltextInit(){
oCont = new makeObj('contenNews')
oScroll = new makeObj('divTextSite','contenNews')
oScroll.moveIt(0,0)
oCont.css.visibility = "visible"
scrolltextLoaded = true
}

if (bw.bw) onload = scrolltextInit

	
	
/* ---------------------> Parte per il wheel <-----------------------------------------	*/	
// INIZIALIZZAZIONE
if (window.addEventListener)  // MOZILLA
window.addEventListener('DOMMouseScroll', wheel, false);

// IE / OPERA
window.onmousewheel = document.onmousewheel = wheel;
	
// GESTORE EVENTO "MOVIMENTO ROTELLA"
function wheel(event)
{		
	// Variabile che conterrà la variazione di movimento
	var delta = 0;

	// INTERNET EXPLORER
	if (!event)
		event = window.event;
	
	// INTERNET EXPLORER E OPERA
	if (event.wheelDelta)
	{
		delta = event.wheelDelta/120;
		// IN OPERA 9 IL SEGNO E’ INVERTITO
		if (window.opera)
			delta = -delta;
	}
	// MOZILLA - LUNGA VITA A MOZILLA
	else if (event.detail)
	{
		// DELTA INVERTITO E MULTIPLO DI 3
		delta = -event.detail / 3;
	}

	// SE IL DELTA E’ DIVERSO DA ZERO ESEGUE LA FUNZIONE HANDLE
	if (delta)
		handle(delta);

	// BLOCCA SCROLLING IN PAGINE LUNGHE…
	if (event.preventDefault)
		event.preventDefault();

	// RITORNA FALSO
	event.returnValue = false;
}

// GESTIONE EVENTO (SCROLLING DIV TESTO)
function handle(delta)
{

	if (delta < 0)
	{
		// SCROLL DOWN		
		scroll(5);		
		scrollWheel = setTimeout("noScroll()", 300)
	}
	else
	{
		// SCROLL UP		
		scroll(-5);
		scrollWheel = setTimeout("noScroll()", 300)
	}
}