function PopUp(w,h,ziel)
{

	parameter = "width=" + w + ", height=" + h + ",";
	x = (screen.availWidth-w)/2;
	y = (screen.availHeight-h)/2;
	parameter += "left=" + x + ",top=" + y;
	parameter += ",menubar=no,location=no,toolbar=no,status=no";
	parameter += ",resizable=yes,scrollbars=auto";
	var Fenster = window.open(ziel,"PopUp",parameter);
	if (Fenster) Fenster.focus();
	return !Fenster;
}

function resizeAndMove(w, h)
{	
	resize = window.resizeTo(w,h);
	x = (screen.availWidth- w)/2;
	y = (screen.availHeight - h)/2;
	move =  window.moveTo(x, y);
	return; 
}