var nn = (navigator.appName == "Netscape") ? true : false

function show_popup()
{
  var size_attr = nn ? "innerWidth=450,innerHeight=138" :
                       "width=450,height=138"

  open("key.htm",
       "Popup",
       "menubar=0,hotkeys,directories=0,toolbar=0,location=0,status=0," +
         "resizable=0,scrollbars=0,dependent," + size_attr).focus()
}