function showpic(Datei, div,fototitel,copyright) {
	document.getElementById("bild").src = Datei;
	var pos = getPosition(div);
	var documentheight = document.getElementById("container").offsetHeight;
	var contentheight = documentheight-28-12;  //(-nav2 -rand_unter_header)
	if (pos.y+322>contentheight) {
		var start = (contentheight-322-246)+"px";
		var s = contentheight-322-251-12;
	}
	else {
		var start = pos.y-219-12-20-36+"px";
		var s = pos.y-219-12-20-36;
	}
	if (s<30) {
		start = "30px";
	}
	document.getElementById("bildrahmen").style.top = start;
	document.getElementById("bildbeschriftung").innerHTML = "<div class='bildtitel'>"+fototitel+"</div><div class='copyright'>"+copyright+"</div>";
	document.getElementById("bildbeschriftung").style.top = (pos.y-317)+"px";
	document.getElementById("bildrahmen").style.visibility = "visible";
	document.getElementById("bild").style.visibility = "visible";
    document.getElementById("bildbeschriftung").style.visibility = "visible";
}
function getPosition(obj) {
  var pos = { x:0, y:0 };

  do {
    pos.x += obj.offsetLeft;
    pos.y += obj.offsetTop;
  } while (obj = obj.offsetParent);

  return pos;
}

function hide() {
	document.getElementById("bild").style.visibility = "hidden";
	document.getElementById("bildrahmen").style.visibility = "hidden";
	document.getElementById("bildbeschriftung").style.visibility = "hidden";
}