![]() HTML Code of the Sample Registration Form The later JavaScript function created is called on the onsubmit event of the form. ![]() When the user does so, they may proceed and can supply value to the next available field. It sets the focus to the input field until the user supplies a valid value. We will create JavaScript functions (one for each input field whose value is to validate) which check whether a value submitted by user passes the validation.Īll those functions are called from another function. The tutorial explores JavaScript validation on submit with detail explanation.įollowing pictorial shows in which field, what validation we want to impose. In this document, we have discussed JavaScript Form Validation using a sample registration form.
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