function PopWin(seite,popupbreit,popuphoch)
{
oben=(screen.height-popuphoch)/2;
links=(screen.width-popupbreit)/2;
F1=open(seite,"","width="+popupbreit+",height="+popuphoch+",screenX="+links+",screenY="+oben+",left="+links+",top="+oben+",location=no,toolbar=no,menubar=no,status=no,directories=no,resizable=no,scrollbars=no")
}