Questo è il codice:
<!doctype html>
<html lang="it">
<head>
<meta charset="utf-8">
<script type="text/javascript">
// <![CDATA[
var colour="#f0f";
var sparkles=50;
/****************************
* Tinkerbell Magic Sparkle *
* (c) 2005 mf2fm web-design *
*
http://www.mf2fm.com/rv *
* DON'T EDIT BELOW THIS BOX *
****************************/
var x=ox=400;
var y=oy=300;
var swide=800;
var shigh=600;
var sleft=sdown=0;
var tiny=new Array();
var star=new Array();
var starv=new Array();
var starx=new Array();
var stary=new Array();
var tinyx=new Array();
var tinyy=new Array();
var tinyv=new Array();
window.onload=function() { if (document.getElementById) {
var i, rats, rlef, rdow;
for (var i=0; i<sparkles; i++) {
var rats=createDiv(3, 3);
rats.style.visibility="hidden";
document.body.appendChild(tiny
=rats);
starv=0;
tinyv=0;
var rats=createDiv(5, 5);
rats.style.backgroundColor="transparent";
rats.style.visibility="hidden";
var rlef=createDiv(1, 5);
var rdow=createDiv(5, 1);
rats.appendChild(rlef);
rats.appendChild(rdow);
rlef.style.top="2px";
rlef.style.left="0px";
rdow.style.top="0px";
rdow.style.left="2px";
document.body.appendChild(star=rats);
}
set_width();
sparkle();
}}
function sparkle() {
var c;
if (x!=ox || y!=oy) {
ox=x;
oy=y;
for (c=0; c<sparkles; c++) if (!starv[c]) {
star[c].style.left=(starx[c]=x)+"px";
star[c].style.top=(stary[c]=y)+"px";
star[c].style.clip="rect(0px, 5px, 5px, 0px)";
star[c].style.visibility="visible";
starv[c]=50;
break;
}
}
for (c=0; c<sparkles; c++) {
if (starv[c]) update_star(c);
if (tinyv[c]) update_tiny(c);
}
setTimeout("sparkle()", 40);
}
function update_star(i) {
if (--starv==25) star.style.clip="rect(1px, 4px, 4px, 1px)";
if (starv) {
stary+=1+Math.random()*3;
if (stary<shigh+sdown) {
star.style.top=stary+"px";
starx+=(i%5-2)/5;
star.style.left=starx+"px";
}
else {
star.style.visibility="hidden";
starv=0;
return;
}
}
else {
tinyv=50;
tiny.style.top=(tinyy=stary)+"px";
tiny.style.left=(tinyx=starx)+"px";
tiny.style.width="2px";
tiny.style.height="2px";
star.style.visibility="hidden";
tiny.style.visibility="visible"
}
}
function update_tiny(i) {
if (--tinyv==25) {
tiny.style.width="1px";
tiny.style.height="1px";
}
if (tinyv) {
tinyy+=1+Math.random()*3;
if (tinyy<shigh+sdown) {
tiny.style.top=tinyy+"px";
tinyx+=(i%5-2)/5;
tiny.style.left=tinyx+"px";
}
else {
tiny.style.visibility="hidden";
tinyv=0;
return;
}
}
else tiny.style.visibility="hidden";
}
document.onmousemove=mouse;
function mouse(e) {
set_scroll();
y=(e)?e.pageY:event.y+sdown;
x=(e)?e.pageX:event.x+sleft;
}
function set_scroll() {
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;
}
}
window.onresize=set_width;
function set_width() {
if (typeof(self.innerWidth)=="number") {
swide=self.innerWidth;
shigh=self.innerHeight;
}
else if (document.documentElement && document.documentElement.clientWidth) {
swide=document.documentElement.clientWidth;
shigh=document.documentElement.clientHeight;
}
else if (document.body.clientWidth) {
swide=document.body.clientWidth;
shigh=document.body.clientHeight;
}
}
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);
}
// ]]>
</script>
</head>
</body>
</html>
