Doing basic field validations to limit what characters can be entered into a form field is easy to do with JavaScript even without using Regular Expressions. In this simple tutorial we look at how you can define lists of characters that are valid for fields that you can call from JavaScript attached to your form. [...]
I have been programming computers since the late 1970s, performing a wide variety of different computer programming jobs, and using a large range of different languages - mostly writing accounting and financial systems for mainframe computers. Since the market for mainframe computer skills moved offshore I have been writing about computers, teaching computer courses in the classroom, and also doing accounting work.
Computer help on a range of different computer related topics
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