Non-text field Validation

[NewDesigner]

Hi,
I appreciate any feedback on this matter>>

I have created a website for my University course which includes a form. So far I have included JavaScript to validate things such as name and address text field to ensure that something has been entered into them.

However, I need to validate a telephone number and not sure what to do for this or how. I would be grateful if anyone could give me any hints or tips on what is available with JavaScript.

Thanks

[Ryan Fait]

This isn't really a JavaScript tip, but you'd be better off using PHP to validate strings. It's much easier and it can't be fooled like JavaScript validation can.

[NewDesigner]

The form uses php to provide feedback to the user but I have originally created the form in a html file and used JavaScript with the onSubmit to display alerts and was wanting to keep all the validation within the html form.

[Ryan Fait]

Ok, I would suggest at least using a PHP validation behind a JavaScript one. I've done it many times to avoid validation, but all a user has to do is disable JavaScript and the form will go through.

[Ryan Fait]

Oh, and:

http://www.google.com/search?q=JavaS...Phone%20Number

[NewDesigner]

Thanks for your comments, I will have a go at uing PHP as well then. I was looking into that but its just having the time. I think it is worth it though.
Thanks again

[ukgeoff]

In both JavaScript and PHP you need to be looking at Regular Expressions to validate patterns like phone numbers, postcodes, email address, etc.