HELP! Server side validation for phone number

Hello, my name is Yuni. I need help in my assignment! Hope any kind soul could help me solve my problem!

My problem is that whenever I type alphabet into the contact number field, there will be error. How could I solve the error by typing what code?
I can validate the minimum input length and client side coding, but I do not know how to code in order to prevent error when typing in invalid answer.

Below is an example of the error if I type "a" into [contact no] field.


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What should I do???

I posted on other forums... they didnt reply me.. I was wondering is it because i provide lack of information??

Thanks
:D

Quote:

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is it because i provide lack of information??

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You need to show the lines of code that are checking the contents of the number field.

Simply check if all chars are numbers?

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SORRY, I NEED SERVER SIDE VALIDATION FOR NUMBER FOR NETBEANS JSP , BUT NOT NETBEANS JAVA PROGRAMMING. THANKS!

lol? Isnt it comedy when people cannot tell the difference between java and website scripting:D

As Norm pointed out, you've provided next to no information, so I'm not sure how you expect to get advice without any context to the question. Suggested reading: How To Ask Questions The Smart Way