Problem using browser without buttns

[lfasci]

Hi

Because I don't want the browser's menus or buttons I changed
the default welcome page with a html one that opens another browser
window here is the javascript code

window.open('public/Login.jsp','Zimbra','toolbar=no,location=no,direct ories=no,status=yes,menubar=no,scrollbars=yes,resi zable=yes,width=,height=');
this.close();

the window opens correctly and everithing seems to work but when I click
on the exit button the browsers (ie 6sp and firefox 1.5.0.4) crash.

what can be wrong ?

thank you