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Use JS to write the stars

Source: Internet
Author: User
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<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<title> Star Effect _www.jb51.net</title>
<meta http-equiv= "Content-type" content= "text/html; charset=gb2312 "/>
<style type= "Text/css" >
<!--
body{
margin:0px;
padding:0px;
}
body,td{
font-size:9pt;
}
. star{
Position:absolute;
width:1px;
height:1px;
font-size:0px;
Background-color: #ffffff;
}
-
</style>
<script type= "Text/javascript" >
<!--
try{
var winsize = {
Width:document.documentElement.clientWidth,
Height:document.documentElement.clientHeight
}
var Moosky = function (options) {
this.options = options;
This.stars = new Array ();
This.show = function () {
for (Var i=0;i<this.options.num;i++) {
var Newstar = new Moostar ({
Container:this.options.container
});
Newstar.fly ();
This.stars[i] = Newstar;
}
}
}
var Moostar = function (options) {
this.options = options;
if (!! This.options.container) {
This.container = document.getElementById (This.options.container);
}else{
This.container = document.body;
}
This.basespeed = 10;
var o = this;
This.speed = Math.Round (Math.random () *this.basespeed) +1;
This.dom = document.createelement (' DIV ');
This.dom.className = ' star ';
if (!! This.options.container) {
var left = Math.Round (Math.random () *this.container.offsetwidth-1);
var top = Math.Round (Math.random () *this.container.offsetheight-1);
This.dom.style.left = left+ ' px ';
This.dom.style.top = top+ ' px ';
This.container.appendChild (This.dom);
}else{
This.dom.style.left = Math.random () *winsize.width-1+ ' px ';
This.dom.style.top = Math.random () *winsize.height-1+ ' px ';
Document.body.appendChild (This.dom);
}
}
MooStar.prototype.fly = function () {
if (this.dom.offsetleft<0) {
if (!! This.options.container) {
var left = this.container.offsetwidth-1;
var top = Math.Round (Math.random () *this.container.offsetheight)-1;
This.dom.style.left = left+ ' px ';
This.dom.style.top = top+ ' px ';
}else{
This.dom.style.left = winsize.width-1+ ' px ';
This.dom.style.top = Math.random () *winsize.height-1+ ' px ';
}
}else{
var left = This.dom.offsetleft-this.speed;
if (left<0) {
This.speed = Math.Round (Math.random () *this.basespeed) +1;
if (!! This.options.container) {
left = this.container.offsetwidth-1;
var top = Math.random () *this.container.offsetheight-1;
This.dom.style.top = top+ ' px ';
}else{
left = winsize.width-1;
}
}
This.dom.style.left = left+ ' px ';
var = this;
Xywtimeout (function () {self.fly ()},this.speed);
}
}
Window.xywxff = function () {
var mooSky1 = new Moosky ({
Num:30,
Container: ' SkyContainer1 '//If container is not declared, it is for document.body implementation
});
Moosky1.show ();
var mooSky2 = new Moosky ({
NUM:20,
Container: ' SkyContainer2 '
});
Moosky2.show ();
/*
This is for the body.
var mooSky3 = new Moosky ({
Num:20
});
Moosky3.show ();
*/
}
Window.onresize = function () {
Winsize = {
Width:document.documentElement.clientWidth,
Height:document.documentElement.clientHeight
}
}
}catch (e) {
alert (e.description);
}
-
</script>
<body scroll=no bgcolor= #000000 >
<div id= ' skyContainer1 ' style= "Height:100px;background-color: #222222; overflow:hidden;font-size:70px;color:# Ffff00;font-weight:bolder ">ABCD</div>
<div id= ' skyContainer2 ' style= "position:absolute;left:200px;top:200px;width:500px;height:100px; Background-color: #222222; " ></div>
</body>

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