var pos = 0;
var g_fPlayMode = 1;
var runner;

function home_next()
{
	Stop();
	if( pos + 1 < total )
	{
		document.getElementById("nota_" + pos ).style.display = "none";
		document.getElementById("nota_" + (pos+1) ).style.display = "block";
		pos++;
	}
	else
	{
		document.getElementById("nota_" + (total-1) ).style.display = "none";
		document.getElementById("nota_0").style.display = "block";
		pos = 0;
	}
}

function home_prev()
{
	Stop();
	if( pos-1 < 0)
	{
		document.getElementById("nota_" + (total-1) ).style.display = "block";
		document.getElementById("nota_0").style.display = "none";
		pos = total-1;
	}
	else
	{
		document.getElementById("nota_" + pos ).style.display = "none";
		document.getElementById("nota_" + (pos-1) ).style.display = "block";
		pos--;
	}
}

function control(how)
{
	if (how=="H") {
		if (g_fPlayMode) 
		{
			Stop();
			document.getElementById("cambiar_estado").src = "images/btn_play.gif";
		}
		else  
		{
			Play();
			document.getElementById("cambiar_estado").src = "images/btn_pausa.gif";
		}
	}

	if (how=="F") home_next();
	if (how=="B") home_prev();
}

function Play()
{
	document.getElementById("cambiar_estado").src = "images/btn_pausa.gif";
	g_fPlayMode = 1;
	runner=setInterval("Tick()", g_dwTimeOutSec*2000);
}

function Stop() {
	document.getElementById("cambiar_estado").src = "images/btn_play.gif";
	g_fPlayMode = 0;
	clearInterval(runner);
}

function Tick(total)
{
	if (g_fPlayMode) control("F");
}

function OnImgLoad(total)
{
	if (g_fPlayMode)
	runner=setInterval("Tick()", g_dwTimeOutSec*2000);
}

function openCalendar()
{
	myRef=window.open("agenda.php","Calendario","width=720,height=600,scrollbars=yes"); 	
}

function openActividad(id)
{
	document.location.href = "actividad.php?id=" + id;
}

function abrir(id)
{	
	if(id > 0)
		myRef=window.open("foro/viewforum.php?f=" + id,"Foros","width=840,height=650,scrollbars=yes"); 	
	else
		myRef=window.open("foro/index.php","Foros","width=840,height=650,scrollbars=yes"); 	
}

function abrir_topic(id)
{	
	if(id > 0)
		myRef=window.open("foro/viewtopic.php?t=" + id,"Foros","width=840,height=650,scrollbars=yes"); 	
	else
		myRef=window.open("foro/index.php","Foros","width=840,height=650,scrollbars=yes"); 	
}