[jQuery] how to delay operation

Hi ,

Am doing one support ticketing systems,

user submit his problem through form ,

my task is after submitted , i want to send his ticketID . to his mail , for track the supprt request ,


The ticket ID not and sequential order , its random order ,

So my idea is we write one mail function , after form submited , after the 30sec , we run the mail function and get the ticket id from the DB using his emailID  and based on ticket created time as the unique ,

,,,no my question is , how run the mail function / any function  after 30second,


please advise


Thanks

bharani