Cron jobs

How do I know when a web host allows cron jobs without asking them?
Does it come under anything like “[FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-3]Custom CGI [/SIZE][/FONT][FONT=Verdana, Arial, Helvetica, sans-serif][SIZE=-3](Perl & PHP)”? Or will I just have to ask them?[/SIZE][/FONT]
[SIZE=1]Thanks[/SIZE]