var xPos = 300;
var yPos = 200; 
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;
$("#img1").css("top", yPos);
function changePos() 
{
    
	width = document.body.clientWidth;
	height =window.screen.availHeight-120;
//	$("#img1").text(document.documentElement.scrollTop);
	Hoffset = document.getElementById("img1").offsetHeight;
	Woffset = document.getElementById("img1").offsetWidth;
	$("#img1").css("left", xPos + document.documentElement.scrollLeft);
	$("#img1").css("top",  yPos + document.documentElement.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()
	 {
	 	$("#img1").css("visibility","visible");
		interval = setInterval('changePos()', delay);
	}
	function pause_resume() 
	{
		if(pause) 
		{
			clearInterval(interval);
			pause = false;
		}
		else 
		{
			interval = setInterval('changePos()',delay);
			pause = true; 
		}
	}
	start();
 function closeBanner()
{
	 clearInterval(interval);
	 $("#img1").hide(1000);
}