function rballs() {
	init();
}

	var nDots = 7;

	var Xpos = 0;

	var Ypos = 0;

	// fixed time step, no relation to real time

	var DELTAT = .01;

	// size of one spring in pixels

	var SEGLEN = 10;

	// spring constant, stiffness of springs

	var SPRINGK = 10;

	// set speed to mc2/345.56 in order to

	// make it look okay

	var MASS = 1;

	var GRAVITY = 50;

	var RESISTANCE = 10;

	// stopping criteria to prevent endless jittering

	// doesn't work when sitting on bottom since floor

	// doesn't push back so acceleration always as big

	// as gravity

	var STOPVEL = 0.1;

	var STOPACC = 0.1;

	var DOTSIZE = 11;

	// BOUNCE is percent of velocity retained when bounced

	var BOUNCE = 0.75;

	var isNetscape = navigator.appName=="Netscape";

	// always on for now, could be played with to

	// let dots fall to botton, get thrown, etc.

	var followmouse = true;

	var dots = new Array();


function init() {

	var i = 0;

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

	dots[i] = new dot(i);

}

if (!isNetscape) {

	// I only know how to read the locations of the 

	// <LI> items in IE

	//skip this for now

	// setInitPositions(dots)

	}

// set their positions

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

dots[i].obj.left = dots[i].X;

dots[i].obj.top = dots[i].Y;

}

if (isNetscape) {

// start right away since they are positioned

// at 0, 0

startanimate();

} else {

// let dots sit there for a few seconds

// sincey they're hiding on the real bullets

setTimeout("startanimate()", 3000);

   }

}

function dot(i) {

this.X = Xpos;

this.Y = Ypos;

this.dx = 0;

this.dy = 0;

if (isNetscape) {

this.obj = eval("document.dot" + i);

} else {

this.obj = eval("dot" + i + ".style");

   }

}

function startanimate() {

setInterval("animate()", 20);

}

// This is to line up the bullets with actual LI tags on the page

function setInitPositions(dots) {

// initialize dot positions to be on top 

// of the bullets in the <ul>

var startloc = document.all.tags("LI");

var i = 0;

for (i = 0; i < startloc.length && i < (nDots - 1); i++) {

dots[i+1].X = startloc[i].offsetLeft

startloc[i].offsetParent.offsetLeft - DOTSIZE;

dots[i+1].Y = startloc[i].offsetTop +

startloc[i].offsetParent.offsetTop + 2*DOTSIZE;

}

// put 0th dot above 1st (it is hidden)

dots[0].X = dots[1].X;

dots[0].Y = dots[1].Y - SEGLEN;

}

// just save mouse position for animate() to use

function MoveHandler(e)

{

Xpos = e.pageX;

Ypos = e.pageY;  

return true;

}

// just save mouse position for animate() to use

function MoveHandlerIE() {

Xpos = window.event.x;

Ypos = window.event.y;  

}

if (isNetscape) {

document.captureEvents(Event.MOUSEMOVE);

document.onMouseMove = MoveHandler;

} else {

document.onmousemove = MoveHandlerIE;

}

function vec(X, Y) {

this.X = X;

this.Y = Y;

}

// adds force in X and Y to spring for dot[i] on dot[j]

function springForce(i, j, spring) {

var dx = (dots[i].X - dots[j].X);

var dy = (dots[i].Y - dots[j].Y);

var len = Math.sqrt(dx*dx + dy*dy);

if (len > SEGLEN) {

var springF = SPRINGK * (len - SEGLEN);

spring.X += (dx / len) * springF;

spring.Y += (dy / len) * springF;

   }

}

function animate() {

// dots[0] follows the mouse,

// though no dot is drawn there

var start = 0;

if (followmouse) {

dots[0].X = Xpos;

dots[0].Y = Ypos;

start = 1;

}

for (i = start ; i < nDots; i++ ) {

var spring = new vec(0, 0);

if (i > 0) {

springForce(i-1, i, spring);

}

if (i < (nDots - 1)) {

springForce(i+1, i, spring);

}

// air resisitance/friction

var resist = new vec(-dots[i].dx * RESISTANCE, -dots[i].dy * RESISTANCE);

// compute new accel, including gravity

var accel = new vec((spring.X + resist.X)/ MASS, (spring.Y + resist.Y)/ MASS + GRAVITY);

// compute new velocity

dots[i].dx += (DELTAT * accel.X);

dots[i].dy += (DELTAT * accel.Y);

// stop dead so it doesn't jitter when nearly still

if (Math.abs(dots[i].dx) < STOPVEL &&

Math.abs(dots[i].dy) < STOPVEL &&

Math.abs(accel.X) < STOPACC &&

Math.abs(accel.Y) < STOPACC) {

dots[i].dx = 0;

dots[i].dy = 0;

}

// move to new position

dots[i].X += dots[i].dx;

dots[i].Y += dots[i].dy;

// get size of window

var height, width;

if (isNetscape) {

height = window.innerHeight;

width = window.innerWidth;

} else {

height = document.body.clientHeight;

width = document.body.clientWidth;

}

// bounce of 3 walls (leave ceiling open)

if (dots[i].Y >=  height - DOTSIZE - 1) {

if (dots[i].dy > 0) {

dots[i].dy = BOUNCE * -dots[i].dy;

}

dots[i].Y = height - DOTSIZE - 1;

}

if (dots[i].X >= width - DOTSIZE) {

if (dots[i].dx > 0) {

dots[i].dx = BOUNCE * -dots[i].dx;

}

dots[i].X = width - DOTSIZE - 1;

}

if (dots[i].X < 0) {

if (dots[i].dx < 0) {

dots[i].dx = BOUNCE * -dots[i].dx;

}

dots[i].X = 0;

}

// move img to new position

dots[i].obj.left = dots[i].X;

dots[i].obj.top =  dots[i].Y;

}

}

// End -->