2.6. Step 1: Get the customer's phone number

It looks like the first thing we need to do with the Break Neck app is make sure we can get the customer's phone number. That's going to take some HTML, a bit of JavaScript, and a lot of help from the web browser.

First, we need to make sure the Break Neck HTML form lets the customer enter
in their phone number.Next, we need to setup the phone number
field so that when it's changed, a new JavaScript function gets called.
    JavaScriptThe JavaScript function we'll write
needs to get the phone number out of the Break Neck order form.
    Customer's Phone NumberIn Step 2, we'll send the phone number on to the
Break Neck web server.
    Web Server

The browser can run a function when events occur in a web page, and give your JavaScript access to user-entered information in the page.