//Autumn leaves- by Kurt Grigg (kurt.grigg@virgin.net)
//Modified by Dynamic Drive for NS6 functionality
//visit http://www.dynamicdrive.com for this script

//Pre-load your image below!
grphcs=new Array(3)
Image0=new Image();
Image0.src=grphcs[0]="gfx/circle1.gif";
Image1=new Image();
Image1.src=grphcs[1]="gfx/circle2.gif"
Image2=new Image();
Image2.src=grphcs[2]="gfx/circle3.gif"

Amount=3; //Smoothness depends on image file size, the smaller the size the more you can use!
Ypos=new Array();
Xpos=new Array();
Speed=new Array();
Step=new Array();
Cstep=new Array();
ns=(document.layers)?1:0;
ns6=(document.getElementById&&!document.all)?1:0;

if (ns){
for (i = 0; i < Amount; i++){
var H=Math.floor(Math.random()*110)+30;
var W=Math.floor(Math.random()*110)+30;
rndPic=grphcs[i];
document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0><img src="+rndPic+" height="+H+" width="+W+"></LAYER>");
}
}
else{
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">');
for (i = 0; i < Amount; i++){
var H=Math.floor(Math.random()*110)+30;
var W=Math.floor(Math.random()*110)+30;
rndPic=grphcs[i];
document.write('<img id="si'+i+'" border="0" src="'+rndPic+'" height="'+H+'" width="'+W+'" alt="circle" style="position:absolute;top:0px;left:0px">');
}
document.write('</div></div>');
}
WinHeight=(ns||ns6)?window.innerHeight:window.document.body.clientHeight;
WinWidth=(ns||ns6)?window.innerWidth-70:window.document.body.clientWidth;
for (i=0; i < Amount; i++){ 
Ypos[i] = Math.round(Math.random()*WinHeight);
Xpos[i] = 10+((WinWidth-20)*(Math.floor(Math.random())));
Speed[i]= Math.random()*2+.5;
Cstep[i]=0;
Step[i]=Math.random()*0.1+0.05;
}
function fall(){
var WinHeight=(ns||ns6)?window.innerHeight:window.document.body.clientHeight;
var WinWidth=(ns||ns6)?window.innerWidth-70:window.document.body.clientWidth;
var hscrll=(ns||ns6)?window.pageYOffset:document.body.scrollTop;
var wscrll=(ns||ns6)?window.pageXOffset:document.body.scrollLeft;
for (i=0; i < Amount; i++){
sy = Speed[i]*Math.cos(.15*Cstep[i])+Math.random();
sx = Speed[i]*Math.sin(Cstep[i])*Math.round(Math.random()*2);
Ypos[i]+=sy;
Xpos[i]+=sx; 
if (Ypos[i] > WinHeight){
Ypos[i]=-60;
Xpos[i] = 10+((WinWidth-20)*(Math.floor(Math.random())));
Speed[i]=Math.random()*2+.5;
}
if (ns){
document.layers['sn'+i].left=Xpos[i];
document.layers['sn'+i].top=Ypos[i]+hscrll;
}
else if (ns6){
document.getElementById("si"+i).style.left=Math.min(WinWidth,Xpos[i]);
document.getElementById("si"+i).style.top=Ypos[i]+hscrll;
}
else{
eval("document.all.si"+i).style.left=Xpos[i];
eval("document.all.si"+i).style.top=Ypos[i]+hscrll;
} 
Cstep[i]+=Step[i];
}
setTimeout('fall()',20);
}

window.onload=fall