If an user miss out any field, than the form will display error message. Checking for form completion: The first step of form validation is to check, whether the user have entered information in all the fields or not. escaping - by -) [0-9] : It matches digital number from 0-9. That means, you could be very sure about the form, whether users have entered the details or not.
Each field in the form can have zero one or more validations. More info & downloads where Do My Validation One() and Do My Validation Two() are custom functions for validation.
First, download the Java Script form validation script here.
Hopefully these behaviours will converge in future releases.
For these examples we have created our own valid/invalid CSS formatting to override the browser default. That's why you may see something like the following: Before you type anything into the box a red marker is shown.