min funktion er "not defined"

Hvad er der galt:

leftPosition=0;
if (screen) {
  leftPosition = screen.width -770;
}

var abstract = new Object();
abstract.closed = true;
function abstractWindow(URL) { // Åbner abstract vindue
  if (self.abstract&&!abstract.closed) {
    abstract.location.href=URL;
    abstract.focus();
  } else {
    abstract = window.open(URL,"abstract","width=750,height=550,top=0,left="+leftPosition+",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes");
    abstract.focus();
  }
}

[...]

<a href="java script:abstractWindow('abstracts/PovlGotke.html');">[abstract]</a>

[...]

Siden er her: www.dahr.dk/afhandlinger.html

Netscape 6 siger:

Error: missing variable name
Source File: http://www.dahr.dk/afhandlinger.html
Line: 45, Column: 4
Source Code:
var abstract = new Object();

Og:

Error: abstractWindow is not defined

//mik