Скрипт для того что бы на странице шел снег

<SCRIPT type=text/javascript>  
// Скрипт снега

var snowmax=30  
var snowcolor=new Array("#AAAACC","#DDDDFF","#CCCCDD","#F3F3F3","#F0FFFF")  
var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")  
var snowletter="*"  
var sinkspeed=0.9
var snowmaxsize=22  
var snowminsize=8  
var snowingzone=1  
var snow=new Array()  
var marginbottom  
var marginright  
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 initsnow() {  
if (ie5) {  
marginbottom = document.body.clientHeight
marginright = document.body.clientWidth  
}  
else if (ns6) {  
marginbottom = document.body.clientHeight
marginright = window.innerWidth  
}  
else if (opera) {  
marginbottom = document.documentElement.clientHeight  
marginright = document.body.clientWidth  
}  
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  
if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}  
if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}  
if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}  
if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}  
snow[i].posy=randommaker(2*marginbottom-marginbottom-2*snow[i].size)  
snow[i].style.left=snow[i].posx  
snow[i].style.top=snow[i].posy  
}  
movesnow()  
}  

function movesnow() {  
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])){  
if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}  
if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}  
if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}  
if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}  
snow[i].posy=0  
}  
}  
var timer=setTimeout("movesnow()",50)  
}  

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