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//3D Starfield - by Mikhail Ansolis, based on Flying planes - by John Ely

//Modified from: Autumn leaves script- by Kurt Grigg (kurt.grigg@virgin.net)

// Visit our site at http://www.elahmad.com/ for more code

//Pre-load your image below!

//CHANGE 5 to the number of images listed below

grphcs=new Array(5)

//PRELOAD the involved images (extend or contract variables according to # of images used)

Image0=new Image();

Image0.src=grphcs[0]="Star0.gif"

Image1=new Image();

Image1.src=grphcs[1]="Star1.gif"

Image2=new Image();

Image2.src=grphcs[2]="Star2.gif"

Image3=new Image();

Image3.src=grphcs[3]="Star3.gif"

Image4=new Image();

Image4.src=grphcs[4]="Star4.gif"

//SPECIFY number of images to randomly display concurrently from list above. Less the more efficient

Amount=20;

Ypos=new Array();

Xpos=new Array();

Zpos=new Array();

//SpeedX=new Array();

//SpeedY=new Array();

ScrXpos=new Array();

ScrYpos=new Array();

Speed=new Array();

Size=new Array();

Step=new Array();

ns=(document.layers)?1:0;

ie=document.all&&navigator.userAgent.indexOf("Opera")==-1

if (ns){

for (i = 0; i < Amount; i++){

var P=Math.floor(Math.random()*grphcs.length);

rndPic=grphcs[P];

document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0><img src="http://www.elahmad.com/java/+rndPic+"></LAYER>");

} //end for

} //end if

else if (ie){ //IE

document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');

for (i = 0; i < Amount; i++){

document.write('<img id="si'+i+'" src="http://www.elahmad.com/java/'+grphcs[Math.round((i+1)*(grphcs.length-1)/Amount)]+'"style="position:absolute;top:0px;left:0px">');

}

document.write('</div></div>');

}

//initialize star properties

if (ie||ns){

WinHeight=(ns)?window.innerHeight-20:window.document.body.clientHeight;

WinWidth=(ns)?window.innerWidth-70:window.document.body.clientWidth;

for (i=0; i < Amount; i++){

Speed[i]=(i+1)*6/Amount+4; //speed range from 4 to 10

Xpos[i] = (Math.random()*WinWidth-WinWidth/2)*(Amount-i/3)/Amount;

Ypos[i] = (Math.random()*WinHeight-WinHeight/2)*(Amount-i/3)/Amount;

Zpos[i] = Math.random()*900*(Amount-i/3)/Amount+100;

}

function fly(){

var WinHeight=(ns)?window.innerHeight-20:window.document.body.clientHeight;

var WinWidth=(ns)?window.innerWidth-70:window.document.body.clientWidth;

var hscrll=(ns)?window.pageYOffset:document.body.scrollTop;

for (i=0; i < Amount; i++){

Zpos[i]-=Speed[i];

if (ScrXpos[i]>WinWidth || ScrXpos[i]<0 || ScrYpos[i]>WinHeight || ScrYpos[i]<0 || Zpos[i]<=0) { //generate new stars

Speed[i]=(i+1)*6/Amount+4; //speed range from 4 to 10

Xpos[i] = (Math.random()*WinWidth-WinWidth/2)*(Amount-i/3)/Amount;

Ypos[i] = (Math.random()*WinHeight-WinHeight/2)*(Amount-i/3)/Amount;

Zpos[i] = Math.random()*900*(Amount-i/3)/Amount+100;

}

ScrXpos[i]=Xpos[i]/Zpos[i]*100 + WinWidth/2;

ScrYpos[i]=Ypos[i]/Zpos[i]*100 + WinHeight/2;

if (ns){

document.layers['sn'+i].left=ScrXpos[i];

document.layers['sn'+i].top=ScrYpos[i]+hscrll;

}

else{ //IE

eval("document.all.si"+i).style.left=ScrXpos[i];

eval("document.all.si"+i).style.top=ScrYpos[i]+hscrll;

}

} //end for

setTimeout('fly()',20);

} //end fly

if (ie||ns)

window.onload=fly

//-->

</SCRIPT>

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