Tiện ích Sao rơi theo trỏ chuột

* Design (Thiết kế) > Edit HTML (Chỉnh sữa HTML)
* Tìm thẻ đóng </head>  và thêm vào trước nó đoạn code sau

<!-- Sao r&#417;i theo tr&#7887; chu&#7897;t -->
<script type='text/javascript'>
// <![CDATA[
var colour="#EF6B7B"; // Mã màu sao r&#417;i
var sparkles=80;
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[i]=rats);

starv[i]=0;

tinyv[i]=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[i]=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[i]==25) star[i].style.clip="rect(1px, 4px, 4px, 1px)";

if (starv[i]) {

stary[i]+=1+Math.random()*3;

if (stary[i]<shigh+sdown) {

star[i].style.top=stary[i]+"px";

starx[i]+=(i%5-2)/5;

star[i].style.left=starx[i]+"px";}else {

star[i].style.visibility="hidden";

starv[i]=0;

return;}}else {tinyv[i]=50;

tiny[i].style.top=(tinyy[i]=stary[i])+"px";

tiny[i].style.left=(tinyx[i]=starx[i])+"px";

tiny[i].style.width="2px";

tiny[i].style.height="2px";

star[i].style.visibility="hidden";

tiny[i].style.visibility="visible"}}

function update_tiny(i) {

if (--tinyv[i]==25) {

tiny[i].style.width="1px";

tiny[i].style.height="1px";}

if (tinyv[i]) {

tinyy[i]+=1+Math.random()*3;

if (tinyy[i]<shigh+sdown) {

tiny[i].style.top=tinyy[i]+"px";

tinyx[i]+=(i%5-2)/5;

tiny[i].style.left=tinyx[i]+"px";}else {

tiny[i].style.visibility="hidden";

tinyv[i]=0;

return;}}else tiny[i].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>

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