Non-text field Validation

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

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.

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.

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.

Oh, and:

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

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

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