var webtvtimer
var webtvtimer_active
webtvtimer_active = true

function ShowWebTVVideo(Position){

	document.getElementById("btnvideo1").style.backgroundPosition="top left";
	document.getElementById("btnvideo2").style.backgroundPosition="top left";
	document.getElementById("btnvideo3").style.backgroundPosition="top left";
	document.getElementById("btnvideo4").style.backgroundPosition="top left";
	document.getElementById("btnvideo" + Position + "").style.backgroundPosition="bottom left";	
	
	if($("div_video1").fx){$("div_video1").fx.stop();}
	if($("div_video2").fx){$("div_video2").fx.stop();}
	if($("div_video3").fx){$("div_video3").fx.stop();}
	if($("div_video4").fx){$("div_video4").fx.stop();}
	
	if(Position == 4)
	{	
		$("div_video1").fx = $("div_video1").effect('opacity', {duration: 500}).start(0);
		$("div_video2").fx = $("div_video2").effect('opacity', {duration: 500}).start(0);
		$("div_video3").fx = $("div_video3").effect('opacity', {duration: 500}).start(0);
		$("div_video4").fx = $("div_video4").effect('opacity', {duration: 500}).start(1);
	}
	else
	{
		if(Position == 3)
		{
			$("div_video1").fx = $("div_video1").effect('opacity', {duration: 500}).start(0);
			$("div_video2").fx = $("div_video2").effect('opacity', {duration: 500}).start(0);
			$("div_video4").fx = $("div_video4").effect('opacity', {duration: 500}).start(0);
			$("div_video3").fx = $("div_video3").effect('opacity', {duration: 500}).start(1);
		}
		else
		{
			if(Position == 2)
			{
				$("div_video1").fx = $("div_video1").effect('opacity', {duration: 500}).start(0);
				$("div_video3").fx = $("div_video3").effect('opacity', {duration: 500}).start(0);
				$("div_video4").fx = $("div_video4").effect('opacity', {duration: 500}).start(0);
				$("div_video2").fx = $("div_video2").effect('opacity', {duration: 500}).start(1);
			}
			else	
			{
				$("div_video2").fx = $("div_video2").effect('opacity', {duration: 500}).start(0);
				$("div_video3").fx = $("div_video3").effect('opacity', {duration: 500}).start(0);
				$("div_video4").fx = $("div_video4").effect('opacity', {duration: 500}).start(0);
				$("div_video1").fx = $("div_video1").effect('opacity', {duration: 500}).start(1);
			}
		}
	}
}

function RollWebTVVideo(Position){
	if(Position > 4) { Position=1; };
	ShowWebTVVideo(Position);
	webtvtimer = setTimeout("RollWebTVVideo(" + (Position + 1) + ")",6000);
}

function StopWebTVVideo() {
	clearTimeout(webtvtimer);
	webtvtimer_active=false;
}

function ClickWebTVVideo(Position)
{
	StopWebTVVideo();
	ShowWebTVVideo(Position);
}

function StartWebTVVideo(Position)
{
	if(webtvtimer_active==false) {
		webtvtimer_active=true;
		RollWebTVVideo(Position);
	}
}