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kitty861027
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會員編號 266103
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I-See幣 11000 錢
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性別  女
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註冊 2007-1-24
註冊天數 6515
來自 香港
狀態 離線
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發表於 2007-2-3 09:04 PM  資料  主頁 短消息  加為好友 
好開心

<div id="dot0" style="position: absolute; visibility: hidden; height: 13; width: 43; left: 47; top: 45">
</div>
<div id="dot1" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#FF0000">☆</font></dd>
</div>
<div id="dot2" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#FFCC00">電</font></dd>
</div>
<div id="dot3" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#FFFF00">腦</font></dd>
</div>
<div id="dot4" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#99FF00">精</font></dd>
</div>
<div id="dot5" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#0000FF">品</font></dd>
</div>
<div id="dot6" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#6699FF">小</font></dd>
</div>
<div id="dot7" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#CC00FF">舖</font></dd>
</div>
<div id="dot8" style="position: absolute; height: 11; width: 11;">
<dd><font size="-1" color="#FF99FF">.</font></dd>
</div>

<script LANGUAGE="JavaScript">
<!-- hide code

var nDots = 9;
if (document.all&&window.print)
document.body.style.cssText="overflow-x:hidden;overflow-y:scroll"
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;
var GRAVITY = 50;
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()", 2000);
}
}


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,
(spring.Y + resist.Y)/ MASS + GRAVITY);

// 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 + document.scrollTop;
width = window.innerWidth + document.scrollLeft;
} else {
height = document.body.clientHeight + document.body.scrollTop;
width = document.body.clientWidth + document.body.scrollLeft;
}

// bounce of 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>





kitty
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