self.name = "Main";

var bool=false;
function WinClose(WinName)
{
    WinName.close();
}

function WinOpen(seite,name,breite,hoehe,scroll,resize)
{
    if ((bool)&&(!PopUp.closed)) WinClose(PopUp);


PopUp=window.open(seite,name,"width="+breite+",height="+hoehe+",screenX=400,screenY=200,scrollbars="+scroll+",resizable="+resize+"");
    bool=true;
}