<div id="dot0" style="position: absolute; visibility: hidden; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 

<div id="dot1" style="position: absolute; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 

<div id="dot2" style="position: absolute; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 

<div id="dot3" style="position: absolute; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 

<div id="dot4" style="position: absolute; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 

<div id="dot5" style="position: absolute; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 

<div id="dot6" style="position: absolute; height: 11; width: 11;"> 

<img src="bullet.gif" height=11 width=11> 

</div> 



<script LANGUAGE="JavaScript"> 

<!-- hide code 



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; 

// all the physics is bogus, just picked stuff to 

// make it look okay 

var MASS = 1; 

// Positive XGRAVITY pulls right, negative pulls left 

// Positive YGRAVITY pulls down, negative up 

var XGRAVITY = 0; 

var YGRAVITY = 50; 

// RESISTANCE determines a slowing force proportional to velocity 

var RESISTANCE = 10; 

// stopping criterea 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 

// bouncing off a wall 

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(); 

init(); 



function init() 

{ 

var i = 0; 

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

dots = 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.obj.left = dots.X; 

dots.obj.top = dots.Y; 

} 





if (isNetscape) { 

// start right away since they are positioned 

// at 0, 0 

startanimate(); 

} else { 

// let dots sit there for a few seconds 

// since they're hiding on the real bullets 

setTimeout("startanimate()", 1000); 

} 

} 







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 

// Had to add -DOTSIZE to X and 2*DOTSIZE to Y for IE 5, not sure why 

// Still doesn't work great 

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.offsetLeft 

startloc.offsetParent.offsetLeft - DOTSIZE; 

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

startloc.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 + document.body.scrollLeft; 

Ypos = window.event.y + document.body.scrollTop; 

} 



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 on dot[j] 

function springForce(i, j, spring) 

{ 

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

var dy = (dots.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.dx * RESISTANCE, 

-dots.dy * RESISTANCE); 



// compute new accel, including gravity 

var accel = new vec((spring.X + resist.X)/MASS + XGRAVITY, 

(spring.Y + resist.Y)/ MASS + YGRAVITY); 



// compute new velocity 

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

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



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

if (Math.abs(dots.dx) < STOPVEL && 

Math.abs(dots.dy) < STOPVEL && 

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

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

dots.dx = 0; 

dots.dy = 0; 

} 



// move to new position 

dots.X += dots.dx; 

dots.Y += dots.dy; 



// get size of window 

var height, width; 

if (isNetscape) { 

height = window.innerHeight + window.pageYOffset; 

width = window.innerWidth + window.pageXOffset; 

} else { 

height = document.body.clientHeight + document.body.scrollTop; 

width = document.body.clientWidth + document.body.scrollLeft; 

} 



// bounce off 3 walls (leave ceiling open) 

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

if (dots.dy > 0) { 

dots.dy = BOUNCE * -dots.dy; 

} 

dots.Y = height - DOTSIZE - 1; 

} 

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

if (dots.dx > 0) { 

dots.dx = BOUNCE * -dots.dx; 

} 

dots.X = width - DOTSIZE - 1; 

} 

if (dots.X < 0) { 

if (dots.dx < 0) { 

dots.dx = BOUNCE * -dots.dx; 

} 

dots.X = 0; 

} 



// move img to new position 

dots.obj.left = dots.X; 

dots.obj.top = dots.Y; 

} 

} 



// end code hiding --> 

</script>