var actualpic = 0;

function showPic(id)
{
	document.getElementById('bigpic').style.backgroundImage = "url(" + bilder[id]["bild"] + ")";
	document.getElementById('picdes').innerHTML = bilder[id]["text"];
	actualpic = id;
}

var gesamtlaenge = 900;
var sichtlaenge = 331;

function movedown()
{
	laenge = sichtlaenge-gesamtlaenge;
	if(parseInt(document.getElementById('motiongal').style.top) >= laenge+57)
	{
		document.getElementById('motiongal').style.top = parseInt(document.getElementById('motiongal').style.top) - 53 + "px";
	}
}

function moveup()
{
	if(parseInt(document.getElementById('motiongal').style.top) <= -1)
	{
		document.getElementById('motiongal').style.top = parseInt(document.getElementById('motiongal').style.top) + 53 + "px";
	}
}