// JavaScript per scroller

function VerificaCompBrowser(){ 
    this.ver=navigator.appVersion 
    this.dom=document.getElementById?1:0 
    this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
    this.ie4=(document.all && !this.dom)?1:0; 
    this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
    this.ns4=(document.layers && !this.dom)?1:0; 
    this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5 ) 
    return this 
} 
bw=new VerificaCompBrowser() 

var speed=50

var loop, timer 
 
function CostrusciOggetto(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=ScorriUp;this.down=ScorriDown; 
    this.Scorri=Scorri; this.x; this.y; 
    this.obj = obj + "Object" 
    eval(this.obj + "=this") 
    return this 
} 

function Scorri(x,y){ 
    this.x=x;this.y=y 
    this.css.left=this.x 
    this.css.top=this.y 
}
 
function ScorriDown(move){ 
	if(this.y>-this.scrollHeight+objContainer.clipHeight){ 
    this.Scorri(0,this.y-move) 
    if(loop) setTimeout(this.obj+".down("+move+")",speed) 
    } 
}
 
function ScorriUp(move){ 
	if(this.y<0){ 
    this.Scorri(0,this.y-move) 
    if(loop) setTimeout(this.obj+".up("+move+")",speed) 
	} 
}
 
function EseguiScroll(speed){ 
	if(initialised){ 
	loop=true; 
	if(speed>0) objScroller.down(speed) 
	else objScroller.up(speed) 
	} 
} 
 
function FermaScroll(){ 
    loop=false 
    if(timer) clearTimeout(timer) 
}
 
var initialised; 
function VistaInizialeScroll(){ 
    objContainer=new CostrusciOggetto('indicescroll') 
    objScroller=new CostrusciOggetto('indicevoci','indicescroll') 
    objScroller.Scorri(0,0) 
    objContainer.css.visibility='visible' 
    initialised=true; 
}