Stars moving in background

<!-- this script got from http://free-javascript-codes.blogspot.com/--><br /> <FONT face=Tahoma color=white></font><br /><br /><br /><br /><!-- STEP ONE: Insert the onLoad event handler into your BODY tag --><br /><br />BGCOLOR="#000000" onLoad="fly()"<br /><br /><!-- STEP TWO: Paste this code into the BODY of your HTML document --><br /><br /><SCRIPT LANGUAGE="JavaScript"><br /><br /><!-- Begin<br />SmallStars = 30; <br />LargeStars = 10;<br />SmallYpos = new Array();<br />SmallXpos = new Array();<br />LargeYpos = new Array();<br />LargeXpos = new Array();<br />Smallspeed= new Array();<br />Largespeed= new Array();<br />ns=(document.layers)?1:0;<br />if (ns) {<br />for (i = 0; i < SmallStars; i++) {<br />document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFF0' CLIP='0,0,1,1'></LAYER>");<br />}<br />for (i = 0; i < LargeStars; i++) {<br />document.write("<LAYER NAME='ln"+i+"' LEFT=0 TOP=0 BGCOLOR='#FFFFFF' CLIP='0,0,2,2'></LAYER>");<br /> }<br />}<br />else {<br />document.write('<div style="position:absolute;top:0px;left:0px">');<br />document.write('<div style="position:relative">');<br />for (i = 0; i < SmallStars; i++) {<br />document.write('<div id="si" style="position:absolute;top:0;left:0;width:1px;height:1px;background:#fffff0;font-size:1px"></div>');<br />}<br />document.write('</div>');<br />document.write('</div>');<br />document.write('<div style="position:absolute;top:0px;left:0px">');<br />document.write('<div style="position:relative">');<br />for (i = 0; i < LargeStars; i++) {<br />document.write('<div id="li" style="position:absolute;top:0;left:0;width:2px;height:2px;background:#ffffff;font-size:2px"></div>');<br />}<br />document.write('</div>');<br />document.write('</div>');<br />}<br />WinHeight = (document.layers)?window.innerHeight:window.document.body.clientHeight;<br />WinWidth = (document.layers)?window.innerWidth:window.document.body.clientWidth;<br />for (i = 0; i < SmallStars; i++) {<br />SmallYpos[i] = Math.round(Math.random() * WinHeight);<br />SmallXpos[i] = Math.round(Math.random() * WinWidth);<br />Smallspeed[i]= Math.random() * 5 + 1;<br />}<br />for (i = 0; i < LargeStars; i++) {<br />LargeYpos[i] = Math.round(Math.random() * WinHeight);<br />LargeXpos[i] = Math.round(Math.random() * WinWidth);<br />Largespeed[i] = Math.random() * 10 + 5;<br />}<br />function fly() {<br />var WinHeight = (document.layers)?window.innerHeight:window.document.body.clientHeight;<br />var WinWidth = (document.layers)?window.innerWidth:window.document.body.clientWidth;<br />var hscrll = (document.layers)?window.pageYOffset:document.body.scrollTop;<br />var wscrll = (document.layers)?window.pageXOffset:document.body.scrollLeft;<br />for (i = 0; i < LargeStars; i++) {<br />LargeXpos[i] -= Largespeed[i];<br />if (LargeXpos[i] < -10) {<br />LargeXpos[i] = WinWidth;<br />LargeYpos[i] = Math.round(Math.random() * WinHeight);<br />Largespeed[i] = Math.random() * 10 + 5;<br />}<br />if (ns) {<br />document.layers['ln'+i].left = LargeXpos[i];<br />document.layers['ln'+i].top = LargeYpos[i] + hscrll;<br />}<br />else {<br />li[i].style.pixelLeft = LargeXpos[i];<br />li[i].style.pixelTop = LargeYpos[i] + hscrll;<br /> }<br />}<br />for (i = 0; i < SmallStars; i++) {<br />SmallXpos[i] -= Smallspeed[i];<br />if (SmallXpos[i] < -10) {<br />SmallXpos[i] = WinWidth;<br />SmallYpos[i] = Math.round(Math.random()*WinHeight);<br />Smallspeed[i] = Math.random() * 5 + 1;<br />}<br />if (ns) {<br />document.layers['sn'+i].left = SmallXpos[i];<br />document.layers['sn'+i].top = SmallYpos[i]+hscrll;<br />}<br />else {<br />si[i].style.pixelLeft = SmallXpos[i];<br />si[i].style.pixelTop = SmallYpos[i]+hscrll;<br /> } <br />}<br />setTimeout('fly()', 10);<br />}<br />// End --><br /></script><br /><br /><br /><br /><font face="Tahoma"><a target="_blank" href="http://free-javascript-codes.blogspot.com/"><span style="font-size: 8pt; text-decoration: none">JavaScript Codes</span></a></font>