function hang(id, fixedTop)
{
	var obj = document.getElementById(id);
	var T;

	if (document.documentElement && document.documentElement.scrollTop)
		T = document.documentElement.scrollTop;
	else if (document.body)
		T = document.body.scrollTop
	else
		{/*Netscape stuff*/}

	if (obj.style.pixelTop < T + fixedTop - 5)
	{
		obj.style.pixelTop += 5;
	}
	else if (obj.style.pixelTop > T + fixedTop + 5)
	{
		obj.style.pixelTop -= 5;
	}

	window.setTimeout("hang('"+ id +"', "+ fixedTop +")", 10);
}


function fly(id, directionX, directionY)
{
	var obj = document.getElementById(id);

	var T = window.document.body.scrollTop;
	var L = window.document.body.scrollLeft;
	var B = T + window.document.body.offsetHeight;
	var R = L + window.document.body.offsetWidth;
	
	
	obj.style.pixelLeft += directionX;
	obj.style.pixelTop += directionY;

	if (obj.style.pixelLeft + obj.style.pixelWidth >= R - 20)
	{
		directionX = -1;
	}
	else if (obj.style.pixelLeft <= L + 3)
	{
		directionX = 1;
	}

	if (obj.style.pixelTop + obj.style.pixelHeight >= B - 3)
	{
		directionY = -1;
	}
	else if (obj.style.pixelTop <= T + 3)
	{
		directionY = 1;
	}

	window.setTimeout("fly('"+ id +"', "+ directionX +", "+ directionY +")", 20);
}