浮动广告代码漂动广告js代码

超酷漂动广告：一个图片（当然也可以是文字）在页面自由移动的特效，做广告不错。

<div id="img" style="position:absolute;; left: 27px; top: 1115px"><a href="http://www.supidea.com/"; target="_blank"><img src="http://www.supidea.com/logo.gif" width="88" height="88" border="2" alt="supidea.com晨飞的梦"></a></div>
<script language="javascript">
<!-- Begin
var xPos = 20;
var yPos = document.body.clientHeight;
var step = 1;
var delay = 30;
var height = 0;
var Hoffset = 0;
var Woffset = 0;
var yon = 0;
var xon = 0;
var pause = true;
var interval;
img.style.top = yPos;
function changePos() {
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;
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() {
img.visibility = "visible";
interval = setInterval('changePos()', delay);
}
start();
//  End -->
</script>
<span id="superball"></span>