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New Perspectives JavaScript and Ajax 2nd Edition |
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If you don't like the road you're on, pave a new one. |
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Tutorial 05 |
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Explored how JS can be used to validate Web forms. Session 5.1 reference different elements in a Web form, including input boxes, selection lists, and option button groups. Saw how to extract values from form fields and use them to create calculated fields. Also learned about some of the difficulties in displaying numeric values in a Web form and techniques to create nicely formatted output. Session 5.2 introduced concept of form validation—comparing benefits and costs of client-side and server-side validation. Learned to validate a form before allowing it to be processed, and learned about the properties and methods associated with string objects. Session 5.3 introduced regular expressions, how to create them and match a wide variety of patterns. Learned the properties and methods associated with regular expression objects. Employed regular expressions to validate sip code and credit card data. Also learned about the Luhn Formula to validate credit card numbers. Concluded with a discussion of passing data from one Web page to another with emphasis on passing field names and values from one Web form to another. |
Tutorial 05 |
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Working with Forms and Regular Expressions |
