validation on numerical values in webdynpro

Hi Friends,

I am facing one probelem with validation on numerical values. In my application there is a scenario.. Input fields are Mibile number and email id.

when i enter the invalid phone number like : 09988wertyy it should throw the error like enter only numerical values.

In the same way i should validate the email id with format .. like ratnakar.alwala@ accenture.com. if it is in valid then it should throw the error.

could any body please give me the approach.

Thanks and Regards

Ratnakar reddy alwala