[Script] Tuyết rơi trên Website

Code tuyết này add vào là chạy, tuy nhiên ko phải trang này nó cũng chạy đàng hoàng, có thể xảy ra lỗi ko chạy, hoạt chạy tùm lum . Cái này nhìn ra hoa tuyết chứ ko tròn tròn như 4rum ta
Demo
Demo: http://dl.dropbox.com/u/8612983/Thu thuat WEB/Tuyetroi.html

Click xem nội dung bên trong

<script type='text/javascript'>
//<=!=[=C=D=A=T=A=[
var snowmax=100
var snowcolor=new Array("#f2f8fa","#eff5f7","#dcedf1","#ffffff")
var snowtype=new Array("Times","Arial","Times","Verdana")
var snowletter="*"
var sinkspeed=0.6
var snowmaxsize=30
var snowminsize=10
// Set 1 for all-over-snowing, set 2 for left-side-snowing
// Set 3 for center-snowing, set 4 for right-side-snowing
var snowingzone=1
// Do not edit below this line
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&&!browse rinfos.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 || opera) {
marginbottom = document.body.scrollHeight
marginright = document.body.clientWidth-15
}
else if (ns6) {
marginbottom = document.body.scrollHeight
marginright = window.innerWidth-15
}
var snowsizerange=snowmaxsize-snowminsize
for (i=0;i<=snowmax;i++) {
crds = 0;
lftrght = Math.random()*15;
x_mv = 0.03 + Math.random()/10;
snow=document.getElementById("s"+i)
snow.style.fontFamily=snowtype[randommaker(snowtype.length)]
snow.size=randommaker(snowsizerange)+snowminsize
snow.style.fontSize=snow.size+'px';
snow.style.color=snowcolor[randommaker(snowcolor.length)]
snow.style.zIndex=1000
snow.sink=sinkspeed*snow.size/5
if (snowingzone==1) {snow.posx=randommaker(marginright-snow.size)}
if (snowingzone==2) {snow.posx=randommaker(marginright/2-snow.size)}
if (snowingzone==3) {snow.posx=randommaker(marginright/2-snow.size)+marginright/4}
if (snowingzone==4) {snow.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+'px';
snow[i].style.top=snow[i].posy+'px';
}
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])+'px';
snow[i].style.top=snow[i].posy+'px';
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>
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