// Snowing Links By Peter Gehrig
// Copyright (c) 2004 Peter Gehrig. All rights reserved.
// Permission given to use the script provided that this notice remains as is.
// Additional scripts can be found at http://Sito Sparito dalla rete
// info@24fun.com 10/27/2004

// Tradotto e spiegato da https://www.iltelaiodipenelope.it

///////////////////////////////////////////////////////
// INIZIO PARAMETRI PERSONALIZZABILI
///////////////////////////////////////////////////////

// Numero fiocchi raccomandati tra i 30 e i 40
var snowmax=35

// Colori dei fiocchi
var snowcolor=new Array("#aaaacc","#ddddFF","#ccccDD")

// Font per visualizzare i fiocchi
var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")

// Simbolo fiocco (*)
var snowletter="*"

// Velocità discesa fiocchi (raccomandata tra 0.3 a 2)
var sinkspeed=0.6

// Grandezza massima dei fiocchi
var snowmaxsize=22

// Grandezza minima dei fiocchi
var snowminsize=8

// Spazio in larghezza occupato dai fiocchi
var snowboxwidth=100

////////////////////////////////////////////////////////
// FINE PARAMETRI PERSONALIZZABILI
////////////////////////////////////////////////////////

// Do not edit below this line
var snow=new Array()
var marginbottom
var marginright
var marginleft
var margintop
var snowingzone=1
var posleft
var postop
var is_snowing=false
var timer
var i_snow=0
var x_mv=new Array();
var crds=new Array();
var lftrght=new Array();
var browserinfos=navigator.userAgent 
var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/)
var ns6=document.getElementById&&!document.all
var opera=browserinfos.match(/Opera/) 
var browserok=ie5||ns6||opera

function randommaker(range) { 
rand=Math.floor(range*Math.random())
return rand
}

function startsnow() {
is_snowing=true
if (ie5 || opera) {
margintop = postop+15
marginbottom = document.body.clientHeight
marginleft = posleft
marginright = posleft+snowboxwidth
}
else if (ns6) {
margintop = postop+15
marginbottom = window.innerHeight
marginleft = posleft
marginright = posleft+snowboxwidth
}
var snowsizerange=snowmaxsize-snowminsize
for (i=0;i<=snowmax;i++) {
crds[i] = 0; 
lftrght[i] = Math.random()*15; 
x_mv[i] = 0.03 + Math.random()/10;
snow[i]=document.getElementById("s"+i)
snow[i].style.fontFamily=snowtype[randommaker(snowtype.length)]
snow[i].size=randommaker(snowsizerange)+snowminsize
snow[i].style.fontSize=snow[i].size
snow[i].style.color=snowcolor[randommaker(snowcolor.length)]
snow[i].sink=sinkspeed*snow[i].size/5
snow[i].posx=randommaker(snowboxwidth)+marginleft-2*snow[i].size
if (ie5 || opera) {
if (snow[i].posx>=document.body.clientWidth-2*snow[i].size) { 
snow[i].posx=snow[i].posx-snowboxwidth
}
}
if (ns6) {
if (snow[i].posx>=window.innerWidth-2*snow[i].size) { 
snow[i].posx=snow[i].posx-snowboxwidth
}
}
snow[i].posy=randommaker(marginbottom-margintop)+margintop-2*snow[i].size
snow[i].style.left=snow[i].posx
snow[i].style.top=snow[i].posy
snow[i].style.visibility="visible";

}
movesnow()
}

function stopsnow() {
is_snowing=false
}

function movesnow() {
if (is_snowing) {
for (i=0;i<=snowmax;i++) {
crds[i] += x_mv[i];
snow[i].posy+=snow[i].sink
snow[i].style.left=snow[i].posx+lftrght[i]*Math.sin(crds[i]);
snow[i].style.top=snow[i].posy

if (snow[i].posy>=marginbottom-2*snow[i].size || parseInt(snow[i].style.left)>(marginright-3*lftrght[i])){
snow[i].posx=randommaker(snowboxwidth)+marginleft-2*snow[i].size
if (ie5 || opera) {
if (snow[i].posx>=document.body.clientWidth-2*snow[i].size) { 
snow[i].posx=snow[i].posx-snowboxwidth
}
}
if (ns6) {
if (snow[i].posx>=window.innerWidth-2*snow[i].size) { 
snow[i].posx=snow[i].posx-snowboxwidth
} 
}
snow[i].posy=randommaker(marginbottom-margintop)+margintop-2*snow[i].size
}
}
var timer=setTimeout("movesnow()",50)
}
else {
for (i=0;i<=snowmax;i++) {
snow[i].style.visibility="hidden";
}
}
}

function getcoordinates(e) {
if (ie5 || opera) {
posleft=document.body.scrollLeft+window.event.x;
postop=document.body.scrollTop+window.event.y;
}
if (ns6) {
posleft=e.pageX
postop=e.pageY
}
}

for (i=0;i<=snowmax;i++) {
document.write("<span id='s"+i+"' style='position:absolute;top:-"+snowmaxsize+"'>"+snowletter+"<\/span>")
}
if (browserok) {
document.onmousemove=getcoordinates
}