window.onscroll=function vorschau(){
	var v_t;
	var v_l;
	var x;
	var s;

	s = document.getElementById("stop").offsetTop;
	x = document.body.scrollTop;
	v_t = document.getElementById("vorschautable").offsetTop;
	v_l = document.getElementById("vorschautable").offsetLeft;



	if(x > v_t )
	{
		document.getElementById("Vorschau").style.top = x + 15 ;
	}
	else
	{
		document.getElementById("Vorschau").style.top = v_t;
	}

	if(x >= s)
	{
		document.getElementById("Vorschau").style.top = s - 50;
	}


	document.getElementById("Vorschau").style.left = v_l;
}