<!-- Begin
var nDots = 2;
var Xpos = 0;
var Ypos = 0;

var DELTAT = .01;
var SEGLEN = 10;
var SPRINGK = 10;
var MASS = 1;
var GRAVITY = 50;
var RESISTANCE = 10;
var STOPVEL = 0.1;
var STOPACC = 0.1;
var DOTSIZE = 60;
var BOUNCE = 0.75;

//var isNetscape = navigator.appName=="Netscape";
var naviType = 0;  //default:IE
if( document.layers ) naviType = 1;  //Netscape4.x
	//Opera,Gecko
else if( window.opera
	||(document.getElementById) && (!document.all) ) naviType = 2;

var followmouse = true;
var dots = new Array();

init();
function init() {
	//Operaの全画面Event拾えない対策
	if(window.opera){
		document.write('<div id="dmy" style="position : absolute; z-index: 0; left: 100%; top: 100%;"></div><br>');
	}

	var i = 0;
	for (i = 0; i < nDots; i++) {
		dots[i] = new dot(i);
	}
	for (i = 0; i < nDots; i++) {
		dots[i].obj.left = dots[i].X;
		dots[i].obj.top = dots[i].Y;
	}
	if (naviType) {
		startanimate();
	} else {
		// let dots sit there for a few seconds
		// since they're hiding on the real bullets
		setTimeout("startanimate()", 700);
	}
}
function dot(i) {
	this.X = Xpos;
	this.Y = Ypos;
	this.dx = 0;
	this.dy = 0;
	if (naviType == 1) {
		this.obj = eval("document.dot" + i);
	}
	else if( naviType == 2 ) {
		this.obj = document.getElementById("dot"+i).style;
	} else {
		this.obj = eval("dot" + i + ".style");
	}
}
function startanimate() {
	setInterval("animate()", 20);
}
function setInitPositions(dots) {
	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;
	}
	dots[0].X = dots[1].X;
	dots[0].Y = dots[1].Y - SEGLEN;
}
function MoveHandler(e) {
	if( window.opera ) {
		Xpos = e.clientX;
		Ypos = e.clientY;
	}
	else {
		Xpos = e.pageX;
		Ypos = e.pageY;
	}
	return true;
}
function MoveHandlerIE() {
	Xpos = window.event.x + document.body.scrollLeft;
	Ypos = window.event.y + document.body.scrollTop;
}
if (naviType) {
	if( naviType == 1 ) 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() {
	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 (naviType == 1) {
			height = window.innerHeight + document.scrollTop;
			width = window.innerWidth + document.scrollLeft;
		} else {
			height = document.body.clientHeight + document.body.scrollTop;
			width = document.body.clientWidth + document.body.scrollLeft;
		}
		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;
		}
		dots[i].obj.left = dots[i].X + 10;
		dots[i].obj.top =  dots[i].Y;
	}
}
// End -->

