##parameters=REQUEST, RESPONSE
serials = REQUEST.get('roles',[])
for role in context.getRoles()[:]:
    if role.tm_serial in serials:
    	context.manage_delObjects([role.getId(),])

msg = "portal_status_message=No+roles+selected."
if serials:
    msg = "portal_status_message=Roles+removed."
RESPONSE.redirect("%s/%s?%s"%(context.absolute_url(), context.getTypeInfo().getActionById('ztmedit'), msg))