function Sobe() 
{
	var marq = document.getElementById("un");
	marq.direction = "up";
}

function Desce() 
{
	var marq = document.getElementById("un");
	marq.direction = "down";
}

function Para() 
{
	var marq = document.getElementById("un");
	marq.stop();
}

function Continua() 
{
	var marq = document.getElementById("un");
	marq.start();
}