setconfig("http://www.fallingobjects.info/gifs/1197822659523.gif",10,2);
var oldwindoww,oldwindowh,windoww,windowh,whichbrowser,picture,total,speed,oldhiddentop,hiddentop,moving;
window.onresize = windowsize;
window.onscroll = scrollcheck;

function browsertype() {
if(!document.all) {
if(document.getElementById)
whichbrowser=1;
}
else
whichbrowser=2;
}

function windowsize() {
if(whichbrowser=="")
browsertype();
if(whichbrowser==1) {
if(oldwindoww=="")
oldwindoww=window.innerWidth;
else
oldwindoww=windoww;
windoww=window.innerWidth;
if(oldwindowh=="")
oldwindowh=window.innerHeight;
else
oldwindowh=windowh;
windowh=window.innerHeight+hiddentop;
}
else {
if(oldwindoww=="")
oldwindoww=document.body.clientWidth;
else
oldwindoww=windoww;
windoww=document.body.clientWidth;
if(oldwindowh=="")
oldwindowh=document.body.clientHeight;
else
oldwindowh=windowh;
windowh=document.body.clientHeight+hiddentop;
}
if(moving) {
var averagediff = (windoww-oldwindoww)/oldwindoww;
var averagediff2 = (windowh-oldwindowh)/oldwindowh;
for(i=1;i<=total;i++) {
var checkleft = parseInt(document.getElementById("movingobject"+i).style.left);
var newleft = parseInt(checkleft+averagediff*checkleft);
if(newleft<0)
newleft=0;
if(newleft>(windoww-70))
newleft = windoww-70;

document.getElementById("movingobject"+i).style.left = newleft;

var checktop = parseInt(document.getElementById("movingobject"+i).style.top);
var newtop = parseInt(checktop+averagediff2*checktop);
if(newtop>(windowh-50))
newtop=Math.round(Math.random()*(-600)-100);
document.getElementById("movingobject"+i).style.top = newtop;
}
}
}

function scrollcheck(){
if(whichbrowser=="")
browsertype();
if(whichbrowser==1) {
oldhiddentop=hiddentop;
hiddentop = window.pageYOffset;
}
else {
oldhiddentop=hiddentop;
hiddentop = document.body.scrollTop;
}
//alert(hiddentop+ " "+oldhiddentop);
if(moving) {
oldwindowh=windowh;
windowh=windowh+(hiddentop-oldhiddentop);
for(i=1;i<=total;i++) {
var checktop = parseInt(document.getElementById("movingobject"+i).style.top);
var newtop = parseInt(checktop+(hiddentop-oldhiddentop));
document.getElementById("movingobject"+i).style.top = newtop;
}
}
}

function setconfig(temppicture,temptotal,tempspeed) {
if(tempspeed>3)
tempspeed=3;
if(tempspeed<1)
tempspeed=1;
if(temptotal<10)
temptotal=10;
if(temptotal>100)
temptotal = 100;
oldhiddentop=0;
hiddentop=0;
picture = temppicture;
total = temptotal;
speed = tempspeed;
browsertype();
windowsize();
scrollcheck();
populate();
move();
}

function populate() {
var randleft;
var randtop;
for(i=1;i<=total;i++) {
randleft = Math.round(Math.random()*(windoww-100)+30);
randtop = Math.round(Math.random()*(-600)-100);
if(randleft<0)
randleft=0;
document.write("<img src='"+picture+"' id='movingobject"+i+"' style='position:absolute; top:"+randtop+"px; left:"+randleft+"px'>");
}
}
function move() {
var movedown;
var moveleft;
var currenttop;
var currentleft;
var newtop;
var newleft;
moving = 1;
for(i=1;i<=total;i++) {
movedown = Math.round(Math.random()*speed+speed)
currenttop = parseInt(document.getElementById("movingobject"+i).style.top);
newtop = parseInt(currenttop+movedown);
if(newtop>(windowh-50)) {
document.getElementById("movingobject"+i).style.top=hiddentop;
continue;
}

currentleft = parseInt(document.getElementById("movingobject"+i).style.left);
moveleft = Math.round(Math.cos(Math.random()*Math.PI)*1.5);
if(parseInt(currentleft+moveleft)<(windoww-70))
newleft = parseInt(currentleft+moveleft);
else
newleft = parseInt(currentleft-moveleft);

document.getElementById("movingobject"+i).style.top= newtop;
document.getElementById("movingobject"+i).style.left= newleft;
}
setTimeout("move()",90/speed);
}