Background Effects >>> Htm Scroller.


		<SCRIPT 
		LANGUAGE="JavaScript">

		/* Visit http://www.yaldex.com/ 
		for full source code

		and get more free JavaScript, CSS and DHTML scripts! */
		

		<!-- Begin

		document.write('<div 
		id="point1" STYLE="position:absolute;visibility:visible;"><img src="ball.gif" 
		width=30 height=29 border=0></div>');

		var 
		xPos =
		20;

		var 
		step =
		1;

		var 
		delay =
		3;

		var 
		yPos =
		0;

		var
		height
		=
		0;

		var
		offset
		=
		0;

		var 
		yon =
		0;

		var 
		IE;

		var 
		point=document.getElementById("point1");

		var
		name
		=
		navigator.appName;

		if
		(name
		==
		"Microsoft Internet Explorer")
		{

		IE=true;

		yPos 
		=
		document.body.clientHeight;

		point.style.top
		= 
		yPos;

		}

		else
		{

		IE=false;

		yPos 
		=
		window.innerHeight;

		point.style.pageY
		= 
		yPos;

		//point.style.visibility = 
		"hidden";

		}

		function 
		changePos()
		{

		if
		(yon
		==
		0)
		{

		yPos 
		= 
		yPos - 
		step;

		}

		else
		{

		yPos 
		= 
		yPos + 
		step;

		}

		if
		(IE)
		{

		height
		=
		document.body.clientHeight;

		offset
		= 
		point.style.offsetHeight;

		}

		else
		{

		height
		=
		window.innerHeight;

		offset
		= 
		point.style.height;

		}

		if
		(yPos
		<
		0)
		{

		yon 
		=
		1;

		yPos 
		=
		0;

		}

		if
		(yPos
		>=
		(height
		-
		offset))
		{

		yon 
		=
		0;

		yPos 
		=
		(height
		-
		offset);

		}

		if
		(IE)
		{

		point.style.left
		= 
		xPos;

		point.style.top
		= 
		yPos +
		document.body.scrollTop;

		}

		else
		{

		point.style.left
		= 
		xPos;

		point.style.top
		= 
		yPos +
		window.pageYOffset;

		   
		}

		}

		function
		start()

		{

		if
		(IE)
		{

		point.visibility
		=
		"visible";

		}

		loopfunc();

		}

		function 
		loopfunc()

		{

		changePos();

		setTimeout('loopfunc()',delay);

		}

		window.onload=start;

		//  End -->

		</script>