Salve ragazzi in un topic qui ho trovato come inserire l'effetto neve sulla home page, ed è uscito bene, solo che quello che ho impostato ha anche diciamo il cumulo, cioè che a fine pagina si deposita la neve, e quindi vorrei togliere solo quel deposito in quanto si "impalla" e non scorre bene.

il sito è questo: www.rino-russo.it 

e questo è il codice html:

<script type="text/javascript"> var speed=33; // lower number for faster
var flakes=100; // number of flakes

var colour="#FFFFFF"; // colour of flakes
var slush=20; // set to '0' for no slush or otherwise set to height at which slush melts

/***************************\
* Let It Snow Effect *
*(c) 2004-6 mf2fm web-design*
* http://www.mf2fm.com/rv *
* DON'T EDIT BELOW THIS BOX *
\***************************/
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>