var anima
	function abajo(eventType)
	{
		pixel = parseInt(document.getElementById("content").style.top);
		if (pixel < 0)
		{
			document.getElementById("content").style.top = pixel + 10
			if (eventType.toLowerCase() == "mouseover" || eventType.toLowerCase() == "over" || eventType.toLowerCase() == "press")
			{
				anima = setTimeout(function ()
									{
										abajo(eventType);
									},50)
			}
		}
	}
	
	function arriba(eventType)
	{
		pixel = parseInt(document.getElementById("content").style.top);
		altura = parseInt(document.getElementById("content").style.height)
		
		var mask_height = parseInt(document.getElementById("content").parentNode.style.height);
		
		if (pixel > (-(altura - mask_height)))
		{
			document.getElementById("content").style.top = pixel - 10
			if (eventType.toLowerCase() == "mouseover" || eventType.toLowerCase() == "over" || eventType.toLowerCase() == "press")
			{
				anima = setTimeout(function ()
									{
										arriba(eventType);
									},50)
			}
		}
	}
	
	function para()
	{
		clearTimeout(anima)
	}
	
	function initScroll ()
	{
		var divContent = document.getElementById("content");
		var divContent_parentDiv = divContent.parentNode;
		if (parseInt(divContent.style.height) > parseInt(divContent_parentDiv.style.height))
		{
			document.getElementById("scrollButtons").style.display = "inline";
		}
	}