Javascript validating forms php

12-Jan-2018 15:10

Our example is very simple as it only checks one field.

Let's expand this example with a more complex function that checks lots of form fields.

Then, after they fill in the "Name" field and press "Send Details" again, it will prompt them for the "Gender" field.

As a finishing touch, try making the script move the cursor to the field that needs filling in each time ( I'm hoping you can provide me with some guidance.

This tutorial will show you how to create a Java Script-enabled form that checks whether a user has filled in the form correctly before it's sent to the server. First we'll explain why form validation is a useful thing, and then build up a simple example form, explaining things as we go along.

My issue is how to make that text field required, but only required based on drop down selection. I am writing a script that validates two select menus. I need to check that it is not "empty" and if not they are alpha characters with -, space and ' special characters and with a limit of 30 chars. @eyefly: I'm guessing you're using cgiemail to process your form on the server?Our example script works by validating all the form fields at once.This can be a bit confusing for the user, especially if they've missed out more than one field, as they will get lots of alert boxes appearing and they might forget which fields they need to fill in!You can then adapt this form to your own requirements.Let's build a simple form with a validation script.

My issue is how to make that text field required, but only required based on drop down selection. I am writing a script that validates two select menus. I need to check that it is not "empty" and if not they are alpha characters with -, space and ' special characters and with a limit of 30 chars. @eyefly: I'm guessing you're using cgiemail to process your form on the server?Our example script works by validating all the form fields at once.This can be a bit confusing for the user, especially if they've missed out more than one field, as they will get lots of alert boxes appearing and they might forget which fields they need to fill in!You can then adapt this form to your own requirements.Let's build a simple form with a validation script.Finally, the "Terms and Conditions" checkbox is validated.