One point to note about Java Script validation is that it can always be circumvented by the user disabling Java Script in their browser, so for secure validation you'll need to write your validating code in your server-side scripts.
However, for day-to-day use Java Script is a quick and easy way to check over your forms before they're sent to your server.
Finally, the "Terms and Conditions" checkbox is validated.
We want to the user to agree to our imaginary Terms and Conditions before they send the form, so we'll check to make sure they've clicked the checkbox: in any one of the above cases, if one or more of our checks fail, the form will not be sent to the server.
Shows you how to write a script that ensures your form is filled in correctly before it's sent to your server.
Great for "required fields" such as email addresses!
You can then adapt this form to your own requirements.
Let's build a simple form with a validation script.
At the end, there's a little exercise to keep you busy too!Our example is very simple as it only checks one field.