n=30;
n4=(document.layers);
n6=(document.getElementById&&!document.all);
ie=(document.all);
doc=(n4||ie)?'document.':'document.getElementById("';
all=(n4||n6)?'':'all.';
n6r=(n6)?'")':'';
s=(n4)?'':'.style';

var h,w;
function Screen(){
h=(ie)?document.body.clientHeight:window.innerHeight;
w=(ie)?document.body.clientWidth:window.innerWidth;
}
Screen();
window.onresize=Screen;

y=new Array();
x=new Array();
stars = new Array();
speed = new Array();
col = new Array('#777777','#aaaaaa','#cccccc','#ffffff');

for (i=0; i < n; i++){
var size=1+Math.random()*2;
if (!n4)
document.write("<div id='strs"+i+"' style='position:absolute;top:0px;left:0px;width:"+size+"px;height:"+size+"px;background:#000000;font-size:"+size+"px'></div>");
if (n4)
document.write("<layer name='strs"+i+"' top=0 left=0 bgcolor=#000000 width="+size+" height="+size+"></layer>");
}

//Initial.
for (i=0; i < n; i++){
y[i]=Math.random()*h;
x[i]=Math.random()*w;
var itemp=eval(doc+all+"strs"+i+n6r+s);
itemp.top=y[i];
itemp.left=x[i];
var rcol = col[Math.floor(Math.random()*col.length)];
(n4)?itemp.bgColor=rcol:itemp.background=rcol;
if (rcol == col[0]) speed[i]=1+Math.random()*1;
else if (rcol == col[1]) speed[i]=2+Math.random()*2;
else if (rcol == col[2]) speed[i]=4+Math.random()*2;
else speed[i]=6+Math.random()*2;
}

function fly(){
sy=(ie)?document.body.scrollTop:window.pageYOffset;
sx=(ie)?document.body.scrollLeft:window.pageXOffset;
for (i=0; i < n; i++){
x[i]-=speed[i];
//Could randomize everything again but kept simple for slower computers.
if (x[i] < -10){
 x[i]=w-((n6)?20:10);
 y[i]=Math.round(Math.random()*h-10);
 }
var temp=eval(doc+all+"strs"+i+n6r+s);
temp.top=y[i]+sy;
temp.left=x[i]+sx;
}
setTimeout('fly()',40);
}
window.onload = fly;