var xPos2 = 400;
var yPos2 = 500; 
var step2 = 1;
var delay2 = 30; 
var height2 = 0;
var Hoffset2 = 0;
var Woffset2 = 0;
var yon2 = 0;
var xon2 = 0;
var pause2 = true;
var interval2;
img2.style.top = yPos2;
function changePos2() 
{
	width = document.body.clientWidth;
	height2 = document.body.clientHeight;
	Hoffset2 = img2.offsetHeight;
	Woffset2 = img2.offsetWidth;
	img2.style.left = xPos2 + document.body.scrollLeft;
	img2.style.top = yPos2 + document.body.scrollTop;
	if (yon2) 
		{yPos2 = yPos2 + step2;}
	else 
		{yPos2 = yPos2 - step2;}
	if (yPos2 < 0) 
		{yon2 = 1;yPos2 = 0;}
	if (yPos2 >= (height2 - Hoffset2)) 
		{yon2 = 0;yPos2 = (height2 - Hoffset2);}
	if (xon2) 
		{xPos2 = xPos2 + step2;}
	else 
		{xPos2 = xPos2 - step2;}
	if (xPos2 < 0) 
		{xon2 = 1;xPos2 = 0;}
	if (xPos2 >= (width - Woffset2)) 
		{xon2 = 0;xPos2 = (width - Woffset2);   }
	}
	
	function start2()
	 {
	 	img2.visibility = "visible";
		interval2 = setInterval('changePos2()', delay2);
	}
	function pause_resume2() 
	{
		if(pause2) 
		{
			clearInterval(interval2);
			pause2 = false;}
		else 
		{
			interval2 = setInterval('changePos2()',delay2);
			pause2 = true; 
			}
		}
	start2();