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February 2001 Genie Application Style Guide 43
Backward Navigation
7
■ Save the values of variables when needed.
If the user exits an entry field, it may be helpful to temporarily save the values of all or
some of the variables. This can reduce the amount of information the user must enter
in the future. For example, it may be helpful to retain non-secure information entered
in an order form, such as the name and address, so that the user does not have to re-
enter it in the same browsing session. See “Cookies and Subscriber ID” later in this
guide for information on using cookies for this purpose.
■ Provide delete shields.
If backing out of an application may cause data loss, provide a card asking the user to
confirm the action.
Example 7-4
Openwave Browser
Nokia 7110 Browser
Mitsubishi Trium Browser
Example 7-4 shows how the confirmation card acts as a delete shield if the user backs
out of the card with the Name prompt preventing loss of data.
■ Retain data in wizard forms.
Many devices have shared Clear and Back keys for text input. Therefore, if the user
wants to edit or change the data in one of the forms, return to the first entry card so
that the user will not have to delete already entered data. When the user navigates
through each card, display the data already entered for that card. It is much easier for
users to navigate forward through each card than to delete what they already entered
in order to navigate back through previous cards.
Are you sure
you want to
cancel your
order?
Yes No
Name (first &
last):
John Doe
Alpha Next
Order
Are you sure you
want to cancel
your order?
Yes No
Name (first &
last):
OK
John Doe
Order