window.open not working in IE

Apparently, this call to window.open is not valid under Internet Explorer. The Javascript code on my site is not running, I would assume it is due to that error.

The line it tells me the error is on, is the call to window.open, apparently an argument is not valid there.

$('.objeto').click( 
        function() {
            var center   = 'height=380,width=900,top='+((screen.width - 900)/2)+',left='+((screen.height - 380)/2);
            var address = $(this).attr('id');
            window.open (address,'Ver articulo', config=center); 
        }
    );

The site runs fine under both Google Chrome, and Firefox.