<HTML>
<HEAD>
<TITLE>小山</TITLE>
</HEAD>
<BODY>
<DIV id="img" style="LEFT: 0px; WIDTH: 99px; POSITION: absolute; TOP: 1582px; HEIGHT: 24px">
<img src="1.jpg" width="50" height="50">
</DIV>
<SCRIPT language="JavaScript">
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();
</SCRIPT>
</BODY>
</HTML>
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