Javascript function for validating numbers

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This is done using HTML5 form validation techniques and CSS, but it only validates the input format (pattern) and not the actual values.

That could be done using Ajax, but would make the CAPTCHA much easier to break.

Tried setting it up on onsubmit on both form and button and no go.The purpose of a form validation script is to return a boolean value ( to reference form fields, but that can lead to namespace conflicts and why make things more complicated than necessary.When the form is submitted - either by hitting Enter or clicking on the Submit button - the to abort (cancel) the form submission. In a real-life situation you will most likely have more fields to check, and more complicated conditions, but the principle remains the same.Most modern browsers now support HTML5 Form Validation making it possible to validate form elements without (or before) any Java Script is triggered.The value of a text input box (or a textarea or password input) is available using the syntax that tells you which option has been selected.

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