// JavaScript Document
/*
if (navigator.platform.match(/Mac/i)) {	scrollStep = 6;	delay = 1; } 
else { scrollStep = 1;	delay = 10; } 
*/

var scrollStep = 51;
var relpos = 0;
var relposBot = -561; // scrollSte = 51 x 11 clicks

var _f1 = document.getElementById('frecce_1');
var _f2 = document.getElementById('frecce_2');
var _f3 = document.getElementById('frecce_3');
var _f4 = document.getElementById('frecce_4');

var timerUp=""
var timerDown=""

function scrollDivDown(id){
frecce_vis();
relpos+=scrollStep;
if (relpos >= 0)  {
	relpos = 0;
	document.getElementById('frecce_3').style.visibility="hidden";
	document.getElementById('frecce_4').style.visibility="hidden";	
}
document.getElementById(id).style.top=relpos+"px";
// clearTimeout(timerDown) 
// timerDown=setTimeout("scrollDivDown('"+id+"')",delay)
}
function scrollDivUp(id){
frecce_vis();
relpos-=scrollStep;
if (relpos <= relposBot) {
	relpos = relposBot;
	document.getElementById('frecce_1').style.visibility="hidden";
	document.getElementById('frecce_2').style.visibility="hidden";	
}
document.getElementById(id).style.top=relpos+"px";
// clearTimeout(timerUp)
// timerUp=setTimeout("scrollDivUp('"+id+"')",delay)
}
function toTop(id){
document.getElementById(id).style.top="0px";
relpos=0;
frecce_vis();
document.getElementById('frecce_3').style.visibility="hidden";
document.getElementById('frecce_4').style.visibility="hidden";
}
function toBottom(id){
document.getElementById(id).style.top=relposBot+"px";
relpos=relposBot;
frecce_vis();
document.getElementById('frecce_1').style.visibility="hidden";
document.getElementById('frecce_2').style.visibility="hidden";
}
function frecce_vis(){
document.getElementById('frecce_1').style.visibility="visible";
document.getElementById('frecce_2').style.visibility="visible";
document.getElementById('frecce_3').style.visibility="visible";
document.getElementById('frecce_4').style.visibility="visible";
}




function stopMe(){
clearTimeout(timerDown) 
clearTimeout(timerUp)
}