var n = (document.layers) ? 1:0;
var ie = (document.all) ? 1:0;
var mem = "";

function Roll(who,img)
{
	document.images(who).src = img;
}

function Roll2(who,img)
{
	if(who != mem.img) document.images(who).src = img;
}

function makeObj(obj,index)
{
	this.css=(n) ? eval('document.div_'+obj+index):eval('document.all.div_'+obj+index+'.style');
	this.ref=(n) ? eval('document.div_'+obj+index+'.document'):eval('document');
	this.freccia = obj;
	this.img = obj+index;
	return this
}

function view(obj)
{
	if(mem == obj)
	{
		mem.css.visibility = "hidden";
		document.images(mem.img).src = "images/arrows/" + mem.freccia + "_on.gif";
		mem = "";
		return;
	}
	if(mem != "")
	{
		mem.css.visibility = "hidden";
		document.images(mem.img).src = "images/arrows/" + mem.freccia + "_off.gif";
	}
	document.images(obj.img).src = "images/arrows/" + obj.freccia + "_inside.gif";
	obj.css.visibility = "visible";
	mem = obj;
}