Sending data back and forth between the client and server can cause some delays.
However, for some form functions, server-side validation is necessary.
You need a custom function that you can later connect to the form.
For more information about creating a function, see JScript Functions.
For example, if you have a form that populates a drop-down list based on the value of another form field, server-side processing may be needed to pull data from a database and populate the drop-down list.