var nDots = 4;
var Xpos = 0;
var Ypos = 0;
var DELTAT = .01;
var SEGLEN = 10;
var SPRINGK = 10;
var MASS = 0.8;
var GRAVITY = 50;
var RESISTANCE = 10;
var STOPVEL = 0.1;
var STOPACC = 0.1;
var DOTSIZE = 10;
var BOUNCE = 0.75;
var isNetscape = navigator.appName=="Netscape";
var followmouse = true;
init();
function init()
{
var i = 0;
dots = new Array();
for (i = 0; i < nDots; i++) 
{
dots[i] = new dot(i);
}
if (!isNetscape) 
{
setInitPositions()	
}
for (i = 0;
i < nDots; i++) 
{dots[i].obj.left = dots[i].X;
dots[i].obj.top = dots[i].Y;	
}
if (isNetscape) 
{
startanimate();	
}
else {
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);
}
function setInitPositions()
{
var startloc = document.all.tags("LI");
var i = 0;
for (i = 0; i < startloc.length; i++) 
{
dots[i+1].X = startloc[i].offsetLeft +					
startloc[i].offsetParent.offsetLeft;		
dots[i+1].Y = startloc[i].offsetTop +					
startloc[i].offsetParent.offsetTop +					
DOTSIZE/2;	
}dots[0].X = dots[1].X;
dots[0].Y = dots[1].Y - SEGLEN;
}
function MoveHandler(e)
{Xpos = e.pageX;
Ypos = e.pageY;	
return true;
}
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;
}
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() 
{	
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);		
}		
var resist = new vec(-dots[i].dx * RESISTANCE,							 
-dots[i].dy * RESISTANCE);		
var accel = new vec((spring.X + resist.X)/ MASS,							
(spring.Y + resist.Y)/ MASS + GRAVITY);  	    
dots[i].dx += (DELTAT * accel.X);		
dots[i].dy += (DELTAT * accel.Y);		
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;		
}	
dots[i].X += dots[i].dx;		
dots[i].Y += dots[i].dy;		
var height, width;		
if (isNetscape) 
{		    
height = window.innerHeight;		    
width = window.innerWidth;		
} 
else 
{			   
height = document.body.clientHeight;		    
width = document.body.clientWidth;		
}		
if (dots[i].X < 0) 
{			
if (dots[i].dx < 0) 
{				
dots[i].dx = BOUNCE *-dots[i].dx;			
}			
dots[i].X = 0;		
}		
dots[i].obj.left = dots[i].X;			
dots[i].obj.top =  dots[i].Y;	
}
}