Usage: casperjs [options] script.[js|coffee] [script argument [script argument ...]]
       casperjs [options] test [test path [test path ...]]

Options:

--cookies-file=/path/to/cookies.txt    Sets the file name to store the persistent cookies
--config=/path/to/config               Specifies path to a JSON-formatted config file
--disk-cache=[yes|no]                  Enables disk cache (at desktop services cache storage location, default is 'no')
--ignore-ssl-errors=[yes|no]           Ignores SSL errors (i.e. expired or self-signed certificate errors)
--load-images=[yes|no]                 Loads all inlined images (default is 'yes')
--load-plugins=[yes|no]                Loads all plugins (i.e. 'Flash', 'Silverlight', ...) (default is 'no')
--local-to-remote-url-access=[yes|no]  Local content can access remote URL (default is 'no')
--max-disk-cache-size=size             Limits the size of disk cache (in KB)
--output-encoding                      Sets the encoding used for terminal output (default is 'utf8')
--proxy=address:port                   Sets the network proxy (e.g. "--proxy=192.168.1.42:8080")
--script-encoding                      Sets the encoding used for the starting script (default is 'utf8')
--version                              Prints out CasperJS version

Read the docs http://n1k0.github.com/casperjs/