Validating a textbox in javascript

17-Mar-2016 13:00

Java Script provides a way to validate form's data on the client's computer before sending it to the web server. First let us see how to do a basic form validation.In the above form, we are calling validate() to validate data when onsubmit event is occurring.Also, the ‘@’ must not be the first character of the email address, and the last dot must at least be one character after the ‘@’ sign. When using Textbox questions, often times you'll want to validate the data your respondents enter.This action name corresponds to the web application name followed by the name of the action method in the JPF file, followed by a However, if your application resides in a Portal application, it is recommended that you use get Netui Tag Name(tag Id, this) to retrieve page elements, since Portal containers may rewrite the id attributes of page elements.For details see Using Java Script in Page Flow and Portal Applications.We'll check each key event individually against each character, which the user enters in the textbox.

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This is particularly useful if you are using complex validation patterns.

The following code shows the implementation of this validate() function.

Now we will see how we can validate our entered form data before submitting it to the web server.

Form validation is frequently done using client-side Java Script.

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This approach is also possible in Web Logic Workshop.

If the data entered by a client was incorrect or was simply missing, the server would have to send all the data back to the client and request that the form be resubmitted with correct information.