//Pre-load your image below! 
grphcs=new Array(2) 
Image0=new Image(); 
Image0.src=grphcs[0]="picts/fall001.gif"; 
Image1=new Image(); 
Image1.src=grphcs[1]="picts/fall002.gif" 
Image2=new Image(); 
Image2.src=grphcs[2]="picts/fall003.gif" 

Amount=10; //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 P=Math.floor(Math.random()*grphcs.length); 
rndPic=grphcs[P];
document.write("<LAYER NAME='sn"+i+"' LEFT=0 TOP=0><img src="+rndPic+"></LAYER>"); 
}
}
else{
document.write('<div style="position:absolute;top:0px;left:0px"><div style="position:relative">'); 
for (i = 0; i < Amount; i++){ 
var P=Math.floor(Math.random()*grphcs.length); 
rndPic=grphcs[P];
document.write('<img id="si'+i+'" src="'+rndPic+'" 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] = Math.round(Math.random()*WinWidth); 
 Speed[i]= Math.random()*5+3; 
 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.sin(90*Math.PI/180); 
sx = Speed[i]*Math.cos(Cstep[i]); 
Ypos[i]+=sy;
Xpos[i]+=sx; 
if (Ypos[i] > WinHeight){ 
Ypos[i]=-60;
Xpos[i]=Math.round(Math.random()*WinWidth);
Speed[i]=Math.random()*5+3;
}
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()',30);
}

window.onload=fall