function fenster()  {
var
win=window.open("rad.html", "FB", "width=550,height=560,left=50,top=50");
}


function fenster2()  {
var
win=window.open("karte_gesa.html", "FB", "width=666,height=520,left=50,top=50");
}



function fensterzu()  {
var
win=window.close("");
}


function fenster3()  {
var
win=window.open("20x20_memory.html", "FB", "width=560,height=530,left=50,top=50");
}