I want my standard_html_header to render differently if a person is a manager or a user. I have in the header <dtml-if "_.SecurityCheckPermission('View', login_py)"> Do something <dtml-else> <form action="login_py"> <input type="submit" value="Member login"></th> </form> </dtml-if> login_py is simply the line container.REQUEST.RESPONSE.redirect(container.REQUEST.HTTP_REFERER) but has the View permissions set to 'Manager/Owner/Authenticated'. When they click on the submit button, they will be prompted for a username and pass since Anonymous does not have view permission for login_py. What I want is for every page to have a login button if the user is not logged in, and display member information if the user is logged in. What happens instead is that the anonymous user gets asked for a password when visiting the site home index_html, which includes the standard_html_header. It appears that zope is trying to access the contents of login_py in the call to <dtml-if "_.SecurityCheckPermission('View', login_py)"> rather than simply check the permission, which surprises me. When I refuse to enter a password for the main site (which should have anonymous access and *does* without the SecurityCheckPermission part, I get the following traceback Traceback (innermost last): [ ... snip ...] File /workn/Zope-2.5.1b1-src/lib/python/DocumentTemplate/DT_With.py, line 76, in render (Object: site_params_py) File /workn/Zope-2.5.1b1-src/lib/python/DocumentTemplate/DT_Let.py, line 76, in render (Object: standard_header_table_params="'width=140 border=0 cellpadding=2 cellspacing=0'") File /workn/Zope-2.5.1b1-src/lib/python/DocumentTemplate/DT_Util.py, line 153, in eval (Object: _.SecurityCheckPermission('View', login_py)) (Info: login_py) File /workn/Zope-2.5.1b1-src/lib/python/OFS/DTMLMethod.py, line 151, in validate (Object: index_html) Unauthorized: You are not allowed to access login_py in this context Advice warmly welcomed, John Hunter Zope Version : (Zope 2.5.1b1 (source release, python 2.1, linux2), python 2.1.3, linux2) Python Version: 2.1.3 (#1, May 31 2002, 14:37:05) [GCC 3.0.4] System Platform linux2