Window.open not working in IE

[sophiedmr]

I have successfully programmed several test scripts in firefox, which allow user to switch between windows etc.
However, I have started trying to test in IE and the I get an error on the window.open.

window.open(sLink, 'fastracwin', 'scrollbars=no,toolbar=no,resizable=yes,status=no,location=no,width=730,height=673');

sLink is "http://clynelish:15080/webfastrac/fastrac_main.html;jsessionid=70CD928EC5361194BBE4B0AE8181A2BC?version=2.6&fastracusage"

The error that I am getting is 'Object doesn't support this property or method' on the window.open.

Any ideas?

Thanks,
Sophie