Problems setting dired-listing-switches variable

[Paul Batt]

I'd like to set the dired listing in such a way that all those filenames 
starting with a point don't show up. But the ..-directory should be there, 
otherwise I see no way to move along the directory tree. In the bash shell 
ls-parameters -al --ignore='.??*' do exactly that. The --ignore part of the 
parameter does not work however, when set to the dired-listing-switches 
variable. Any help?
Thank you, Paul