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Background Effects >>> Bouncing Image.

Randomly bounces an image, or anything within a DIV, across the page. Click on the image to start and stop it from moving.

Step 1: Add the below code to the <BODY> section of your page:

<div align="center" id="img" style="position:absolute;">
<img src="ball.gif" onMouseDown="pauseResume();">
</div>
<SCRIPT LANGUAGE="JavaScript">
/* Visit http://www.yaldex.com/ for full source code
and get more free JavaScript, CSS and DHTML scripts! */

<!-- Begin
var step = 5;
var delay = 30;
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
var name = navigator.appName;
if(name == "Microsoft Internet Explorer") name = true;
else name = false;
var xPos = 20;
if(name) var yPos = document.body.clientHeight;
else var yPos = window.innerHeight;
function changePos() {
if(name) {
width = document.body.clientWidth;
height = document.body.clientHeight;
Hoffset = img.offsetHeight;
Woffset = img.offsetWidth;
img.style.left = xPos + document.body.scrollLeft;
img.style.top = yPos + document.body.scrollTop;
}
else {
height = window.innerHeight;
width = window.innerWidth;
Hoffset =33;
Woffset =30;
document.getElementById('img').style.top = yPos + window.pageYOffset;
document.getElementById('img').style.left = xPos + window.pageXOffset;
}
if (yon) {
yPos = yPos + step;
}
else {
yPos = yPos - step;
}
if (yPos < 0) {
yon = 1;
yPos = 0;
}
if (yPos >= (height - Hoffset)) {
yon = 0;
yPos = (height - Hoffset);
}
if (xon) {
xPos = xPos + step;
}
else {
xPos = xPos - step;
}
if (xPos < 0) {
xon = 1;
xPos = 0;
}
if (xPos >= (width - Woffset)) {
xon = 0;
xPos = (width - Woffset);
   }
}
function start() {
document.getElementById('img').style.visibility = "visible";
interval = setInterval('changePos()',delay);
}
function pauseResume() {
if(pause) {
clearInterval(interval);
pause = false;
}
else {
interval = setInterval('changePos()',delay);
pause = true;
   }
}
start();
//  End -->
</script>

Step 2: The script uses an image as part of its interface. You can create your own, or use the below):

(right click image, and select "Save Image As")
Upload it into the same directory as your webpage.

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