<div id="img" style="position:absolute;">
<img src="http://www.30t.com/javascript/ku.gif"
onClick="pause_resume();">

<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);
}function pause_resume() {if(pause) {clearInterval(interval);pause = false;}else {interval = setInterval('changePos()',delay);pause = true;}}start();// End --></script>