Programalama > JAVA SCRIPT

<script language="JavaScript">
<!-- Starfield -

n=20;// Number of stars!
n4=(document.layers);
ie=(document.all);

for (i=0; i < n; i++){
if (n4)
document.write("<layer name='stars"+i+"' top=0 left=0 bgcolor=#ffffff width=1 height=1></layer>");
else
document.write('<div id="stars'+i+'" style="position:absolute;width:1px;height:1px;background:#ffffff;font-size:1px">.</div>');
}

h=0;
w=0;
cy=0;
cx=0;

y=new Array();
x=new Array();
iy=new Array();
ix=new Array();
dir=new Array();
v=new Array();
ds=new Array();
ac=new Array();

for (i=0; i < n; i++){
iy[i]=Math.random()*h;
ix[i]=Math.random()*w; 
y[i]=iy[i];
x[i]=ix[i];
v[i]=1.3;
ac[i]=0;
ds[i]=0;
}

function fly(){
h=(ie)?document.body.clientHeight:window.innerHeight;
w=(ie)?document.body.clientWidth:window.innerWidth;
sy=(ie)?document.body.scrollTop:window.pageYOffset;
sx=(ie)?document.body.scrollLeft:window.pageXOffset;
cy=Math.floor((h/2));
cx=Math.floor((w/2));
for (i=0; i < n; i++){
divs=(n4)?document.layers["stars"+i]:document.getElementById("stars"+i).style;

ay=y[i]-cy;
ax=x[i]-cx;
dir[i]=Math.atan2(ay,ax)*180/Math.PI;

v[i]+=ac[i];
v[i]+=(v[i]/10);

if (v[i] > 0.4 && v[i] < 0.5){
 if (!n4){divs.fontSize=2;divs.height=2;divs.width=2}
 else{divs.clip.height=2;divs.clip.width=2}
}
if (v[i] > 10){
 if (!n4){divs.fontSize=2;divs.height=2;divs.width=2;}
 else{divs.clip.height=2;divs.clip.width=2;}
}
if (v[i] > 20){
 if (!n4){divs.fontSize=3;divs.height=3;divs.width=3}
 else{divs.clip.height=3;divs.clip.width=3}
}
if (v[i] > 30){
 if (!n4){divs.fontSize=5;divs.height=5;divs.width=5}
 else{divs.clip.height=5;divs.clip.width=5}
}

y[i]+=v[i]*Math.sin(dir[i]*Math.PI/180);
x[i]+=v[i]*Math.cos(dir[i]*Math.PI/180);

if (y[i] < 0 || y[i] > h-Math.round(v[i]) || x[i] < 0 || x[i] > w-Math.round(v[i])){ 
iy[i]=Math.random()*h;
ix[i]=Math.random()*w;
y[i]=iy[i];
x[i]=ix[i];
dx=cy-y[i];
dy=cx-x[i];
ds[i]=Math.sqrt(dy*dy+dx*dx);
ac[i]+=(-(ds[i]*ds[i])+(160000))/(100000000);//?
v[i]=Math.floor(ds[i]/40);
if (!n4){divs.fontSize=1;divs.height=1;divs.width=1}
else{divs.clip.height=1;divs.clip.width=1}
}
divs.top=y[i]+sy;
divs.left=x[i]+sx;
}
setTimeout('fly()',10);
}
fly();
// -->
</script>