function addEvent(obj,type,fn)
{
	if(obj.attachEvent){
		obj['e'+type+fn] = fn;
		obj[type+fn] = function(){obj['e'+type+fn](window.event );}
		obj.attachEvent('on'+type, obj[type+fn]);
	} else {
		obj.addEventListener(type,fn,false);
	};
};

addEvent(window,"load",time_out);

function time_out()
{
	setTimeout('muestra_capa()',500);
}

function muestra_capa()
{	
	$('#div_transparente').show('normal');
	setTimeout('muestra_contenido()',500);
}
function muestra_contenido()
{
	$('#contenido_negro').slideDown('slow');
}
function entrar()
{
	window.location.href = "home.php";
}

i = 0;
var speed = 5;
function scrollUp(div_name)
{
	//lert('');
	i = i + speed;
	var div = document.getElementById(div_name);
	div.scrollTop = i;
	if (i > div.scrollHeight - 160) {i = 0}
	t1=setTimeout("scrollUp('" + div_name + "')",100);
}
function scrollDown(div_name)
{
	//lert('');
	i = ((i - speed) < 0) ? 0 : i - speed;
	var div = document.getElementById(div_name);
	div.scrollTop = i;
	if (i > div.scrollHeight - 160) {i = 0}
	t1=setTimeout("scrollDown('" + div_name + "')",100);
}
function stopScroll() {
        clearTimeout(t1);
    }