Spoiler:

Código:

<script src="http://astuforum.free.fr/js/neige-mini.js"></script>

Painel de controle Geral Configuração.

Código:

/******************************************
* Snow Effect Script- By Altan d.o.o. (http://www.altan.hr/snow/index.html)
******************************************/

//Localização da imagem do floco de neve
var snowsrc="http://fotos.imagensporfavor.com/img/pics/glitters/f/flocos_de_neve-5611.gif"
// Quantidade de flocos de neve na tela
var no = 10;
// Configure whether snow should disappear after x seconds (0=never):
var hidesnowtime = 0;
// Configure how much snow should drop down before fading ("windowheight" or "pageheight")
var snowdistance = "pageheight";

///////////Stop Config//////////////////////////////////

var ie4up = (document.all) ? 1 : 0;
var ns6up = (document.getElementById&&!document.all) ? 1 : 0;

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

var dx, xp, yp; // coordinate and position variables
var am, stx, sty; // amplitude and step variables
var i, doc_width = 800, doc_height = 600;

if (ns6up) {
doc_width = self.innerWidth;
doc_height = self.innerHeight;
} else if (ie4up) {
doc_width = iecompattest().clientWidth;
doc_height = iecompattest().clientHeight;
}

dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
snowsrc=(snowsrc.indexOf("dynamicdrive.com")!=-1)? "snow.gif" : snowsrc
for (i = 0; i < no; ++ i) {
dx[i] = 0; // set coordinate variables
xp[i] = Math.random()*(doc_width-50); // set position variables
yp[i] = Math.random()*doc_height;
am[i] = Math.random()*20; // set amplitude variables
stx[i] = 0.02 + Math.random()/10; // set step variables
sty[i] = 0.7 + Math.random(); // set step variables
if (ie4up||ns6up) {
if (i == 0) {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://dynamicdrive.com\"><img src='"+snowsrc+"' border=\"0\"><\/a><\/div>");
} else {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"><\/div>");
}
}
}

function snowIE_NS6() { // IE and NS6 main animation function
doc_width = ns6up?window.innerWidth-10 : iecompattest().clientWidth-10;
doc_height=(window.innerHeight && snowdistance=="windowheight")? window.innerHeight : (ie4up && snowdistance=="windowheight")? iecompattest().clientHeight : (ie4up && !window.opera && snowdistance=="pageheight")? iecompattest().scrollHeight : iecompattest().offsetHeight;
for (i = 0; i < no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] > doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
}
dx[i] += stx[i];
document.getElementById("dot"+i).style.top=yp[i]+"px";
document.getElementById("dot"+i).style.left=xp[i] + am[i]*Math.sin(dx[i])+"px";
}
snowtimer=setTimeout("snowIE_NS6()", 10);
}

function hidesnow(){
if (window.snowtimer) clearTimeout(snowtimer)
for (i=0; i<no; i++) document.getElementById("dot"+i).style.visibility="hidden"
}


if (ie4up||ns6up){
snowIE_NS6();
if (hidesnowtime>0)
setTimeout("hidesnow()", hidesnowtime*1000)
}

Código:

/******************************************
* Snow Effect Script- By Altan d.o.o. (http://www.altan.hr/snow/index.html)
******************************************/

//Localização da imagem do floco de neve
var snowsrc="http://fotos.imagensporfavor.com/img/pics/glitters/f/flocos_de_neve-5611.gif"
// Quantidade de flocos de neve na tela
var no = 30;
// Configure whether snow should disappear after x seconds (0=never):
var hidesnowtime = 0;
// Configure how much snow should drop down before fading ("windowheight" or "pageheight")
var snowdistance = "pageheight";

///////////Stop Config//////////////////////////////////

var ie4up = (document.all) ? 1 : 0;
var ns6up = (document.getElementById&&!document.all) ? 1 : 0;

function iecompattest(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

var dx, xp, yp; // coordinate and position variables
var am, stx, sty; // amplitude and step variables
var i, doc_width = 800, doc_height = 600;

if (ns6up) {
doc_width = self.innerWidth;
doc_height = self.innerHeight;
} else if (ie4up) {
doc_width = iecompattest().clientWidth;
doc_height = iecompattest().clientHeight;
}

dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
snowsrc=(snowsrc.indexOf("dynamicdrive.com")!=-1)? "snow.gif" : snowsrc
for (i = 0; i < no; ++ i) {
dx[i] = 0; // set coordinate variables
xp[i] = Math.random()*(doc_width-50); // set position variables
yp[i] = Math.random()*doc_height;
am[i] = Math.random()*20; // set amplitude variables
stx[i] = 0.02 + Math.random()/10; // set step variables
sty[i] = 0.7 + Math.random(); // set step variables
if (ie4up||ns6up) {
if (i == 0) {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://dynamicdrive.com\"><img src='"+snowsrc+"' border=\"0\"><\/a><\/div>");
} else {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"><\/div>");
}
}
}

function snowIE_NS6() { // IE and NS6 main animation function
doc_width = ns6up?window.innerWidth-10 : iecompattest().clientWidth-10;
doc_height=(window.innerHeight && snowdistance=="windowheight")? window.innerHeight : (ie4up && snowdistance=="windowheight")? iecompattest().clientHeight : (ie4up && !window.opera && snowdistance=="pageheight")? iecompattest().scrollHeight : iecompattest().offsetHeight;
for (i = 0; i < no; ++ i) { // iterate for every dot
yp[i] += sty[i];
if (yp[i] > doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
}
dx[i] += stx[i];
document.getElementById("dot"+i).style.top=yp[i]+"px";
document.getElementById("dot"+i).style.left=xp[i] + am[i]*Math.sin(dx[i])+"px";
}
snowtimer=setTimeout("snowIE_NS6()", 10);
}

function hidesnow(){
if (window.snowtimer) clearTimeout(snowtimer)
for (i=0; i<no; i++) document.getElementById("dot"+i).style.visibility="hidden"
}


if (ie4up||ns6up){
snowIE_NS6();
if (hidesnowtime>0)
setTimeout("hidesnow()", hidesnowtime*1000)
}

<script src=ENDEREÇO_DA_PAGINA_HTML></script>

<script type="text/javascript">
var speed=33; // Quanto menor o número maior será a velocidade da neve.
var flakes=100; // Esse número representa a quantidade de flocos de neve.
var colour="#FFFFFF"; // Cor da neve.
var slush=0; // Esse número representa a quantidade de neve que ficará "acumulada" na parte de baixo da tela, coloque 0 caso não queira que a neve se acumule.


var flks=new Array();
var flkx=new Array();
var flky=new Array();
var fldy=new Array();
var slss=new Array();
var slsh=new Array();
var swide, shigh;
window.onload=function() { if (document.getElementById) {
var b, s;
b=document.createElement("div");
s=b.style;
s.position="absolute";
b.setAttribute("id", "bod");
document.body.appendChild(b);
set_scroll();
set_width();
for (var i=0; i<flakes; i++) {
flks[i]=createDiv(3, 3);
flkx[i]=3*Math.floor(Math.random()*swide/3);
flky[i]=Math.floor(Math.random()*shigh);
fldy[i]=2+Math.floor(Math.random()*4);
flks[i].style.left=flkx[i]+"px";
flks[i].style.top=flky[i]+"px";
b.appendChild(flks[i]);
}
setInterval("let_it_snow()", speed);
}}


function createDiv(height, width) {
var div=document.createElement("div");
div.style.position="absolute";
div.style.height=height+"px";
div.style.width=width+"px";
div.style.overflow="hidden";
div.style.backgroundColor=colour;
return (div);
}


window.onresize=set_width;
function set_width() {
if (document.documentElement && document.documentElement.clientWidth) {
swide=document.documentElement.clientWidth;
shigh=document.documentElement.clientHeight;
}
else if (typeof(self.innerHeight)=="number") {
swide=self.innerWidth;
shigh=self.innerHeight;
}
else if (document.body.clientWidth) {
swide=document.body.clientWidth;
shigh=document.body.clientHeight;
}
swide-=3;
if (slush) {
if (swide/3>slss.length) for (var i=slss.length; i<swide/3; i++) {
slss[i]=createDiv(3, 3);
slss[i].style.left=3*i+"px";
document.getElementById("bod").appendChild(slss[i]);
slsh[i]=3;
}
for (var i=0; i<swide/3; i++) slss[i].style.top=shigh-slsh[i]+"px";
}
}


window.onscroll=set_scroll;
function set_scroll() {
var sleft, sdown;
if (typeof(self.pageYOffset)=="number") {
sdown=self.pageYOffset;
sleft=self.pageXOffset;
}
else if (document.body.scrollTop || document.body.scrollLeft) {
sdown=document.body.scrollTop;
sleft=document.body.scrollLeft;
}
else if (document.documentElement && (document.documentElement.scrollTop || document.documentElement.scrollLeft)) {
sleft=document.documentElement.scrollLeft;
sdown=document.documentElement.scrollTop;
}
else {
sdown=0;
sleft=0;
}
var s=document.getElementById("bod").style;
s.top=sdown+"px";
s.left=sleft+"px";
}


function let_it_snow(c) {
var i, x, o=0;
for (i=0; i<flakes; i++) {
flky[i]+=fldy[i];
x=flkx[i]/3;
if (slush) o+=slsh[x];
if (flky[i]>=shigh-(slush?slsh[x]:0)) {
if (slush) {
if (x<swide && slsh[x]>slsh[x+1]+3) x++;
else if (x>0 && slsh[x]>slsh[x-1]+3) x--;
slss[x].style.top=shigh-(slsh[x]+=3)+"px";
slss[x].style.height=slsh[x]+"px";
}
flky[i]=0;
fldy[i]=2+Math.floor(Math.random()*4);
flkx[i]=3*Math.floor(Math.random()*swide/3);
flks[i].style.left=flkx[i]+"px";
}
flks[i].style.top=flky[i]+"px";
}
if (o>flakes*slush) {
for (i=0; i<swide/3; i++) if (slsh[i]>1) slsh[i]--;
set_width();
}
}
</script>

Código:

<script src=http://sd-1.archive-host.com/membres/up/142586199450897653/snow.js></script>