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Now, when you have finished learning how to validate a sample registration form using Java Script, let us take you to the another way doing the same thing.But this time, the instead of on submitting the form, validations are on field level, i.e. Sure that will be preety interesting to learn and share as well.

You can view this Sample Java Script Registration From Validation Example in a separate browser window and check how the validation is working.If an HTML document contains more than one forms, they can be accessed as either by document.form_name where form_name is the value of the name attribute of the form element or by document.forms[i] where i is 0, 1,2,3....and document.forms[0] refers to the first form of the document, document.forms[1] refers to the second form of the document and so on.Validating form input with Java Script is easy to do and can save a lot of unnecessary calls to the server as all processing is handled by the web browser.It can prevent people from leaving fields blank, from entering too little or too much or from using invalid characters.

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