var Fensterzahl=0; var OpenWin;

function fenster(page,w,h)
{
if(Fensterzahl>0)
{
if(OpenWin.closed==false)
OpenWin.close()
}
OpenWin=window.open(page,"CtrlWindow","width="+w+",height="+h+",scrollbars=yes");
Fensterzahl=1
OpenWin.focus();
}