If so, it allows it to be submitted to the server and (usually) saved in a database; if not, it gives you error messages to explain what you've done wrong (provided you've done it right).Form validation can be implemented in a number of different ways.The option of using pure HTML, sometimes with a touch of CSS, to complement Java Script form validation was until recently unthinkable.Sure there have been all kinds of whacky plug-ins over the years aimed at achieving this, but never a single standard that we could work towards.By using the hooks provided by this module, you can also define your own validation rules in your own modules.The following validation rules are currently included: A: You can validate against a whole range of things using the regular expressions validation rules, so we cannot give examples for every use case.He has been a featured speaker at many industry events including Microsoft Dev Days and the ASP. Shannon speaks and trains for companies such as App Dev ( and Learn It ( and has been a featured speaker in training videos with Learn Key. Data validation over the Web is performed in one of two locations: on the user's computer, or on the Web server.
A slightly negative aspect of validating data on the user's computer is that the validation is performed via a script residing in the Web page. You only have two possible scripting languages that you can use on a user's computer: VBScript or Java Script.Form validation helps us achieve these goals — this article tells you what you need to know.This is called form validation — when you enter data the web application checks it to see if it is correct.You could ask for some help in the issue queue with regards to your exact regular expression.There are already some examples available; have a look at Regular Expressions for Webform Validation (thx nfd) and for more examples.