|
<div id="dot0" style="position: absolute;
visibility: hidden; height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<div id="dot1" style="position: absolute;
height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<div id="dot2" style="position: absolute;
height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<div id="dot3" style="position: absolute;
height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<div id="dot4" style="position: absolute;
height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<div id="dot5" style="position: absolute;
height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<div id="dot6" style="position: absolute;
height: 9; width: 8;">
<img
src="http://dollie-bliss.com/you/trails/images/trail3.gif" width="9"
height="8">
</div>
<script LANGUAGE="JavaScript">
<!--
hide code
/*
Elastic Trail script (By Philip Winston @
pwinston@yahoo.com, URL: http://www.geocities.com/pwinston/)
Script
featured on Dynamicdrive.com
For this and 100's more DHTML scripts, visit http://dynamicdrive.com
*/
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[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
// 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[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 +
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[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 +
XGRAVITY,
(spring.Y + resist.Y)/ MASS +
YGRAVITY);
// 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 +
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[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 code hiding -->
</script> | 
AJÁNLOM AZ OLDALT
