December 2002
Intermediate to advanced
745 pages
17h 26m
English
book
Oracle® Web Application Programming for PL/SQL® Developers
by Susan Boardman, Melanie Caffrey, Solomon Morse, Benjamin Rosenzweig
Content preview from Oracle® Web Application Programming for PL/SQL® Developers
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Chapter 14. JavaScript Form Validation
Chapter Objectives
After this lab, you will learn about:
HTML forms help make a Web site more interactive by allowing the user to input information that can be processed by a server-side script. Usually, the data is input into a database. Since the data is entered by a Web site user, the data will not always be complete nor of the correct datatype. Problems with the data will be uncovered only upon an attempt to insert into or update current values in the database. This wastes valuable time, network bandwidth, and database resources. Validating the data on the front-end as much as possible before sending it to the back-end will aid in ...