// variable for timer
var timer;

function soar()
{
	var obj = document.getElementById("lyr");

	obj.style.top = (parseInt(obj.style.top)-1)+"px";

	timer = window.setTimeout("soar()", 50);
}

function sink()
{
	var obj = document.getElementById("lyr");

	obj.style.top = (parseInt(obj.style.top)+1)+"px";

	timer = window.setTimeout("sink()", 50);
}

function stop()
{	
	clearTimeout(timer);
}