function fenster (v)
{
     win=window.open(v,'myname',"width=400,height=300,resizable=no,scrollbars=no,toolbar=no,location=no,menubar=no,status=no");
}
function fenster2 (v)
{
     win=window.open(v,'myname',"width=300,height=400,resizable=no,scrollbars=no,toolbar=no,location=no,menubar=no,status=no");
}
function fenster3 (v)
{
     win=window.open(v,'myname',"width=500,height=500,resizable=yes,scrollbars=yes,toolbar=yes,location=yes,menubar=yes,status=yes");
}

var features = new Array();
features[0] = "width=400,height=300,resizable=no,scrollbars=no,toolbar=no,location=no,menubar=no,status=no";
features[1] = "width=300,height=400,resizable=no,scrollbars=no,toolbar=no,location=no,menubar=no,status=no";
features[2] = "width=500,height=500,resizable=yes,scrollbars=yes,toolbar=yes,location=yes,menubar=yes,status=yes";

function popper(res,tit,fn) {
  // schliessen, wenn noch offen
  if(typeof obj == 'object' && !obj.closed) obj.close();
  obj = window.open(res,tit,features[fn]);
  obj.focus();
}