2.35. Finishing off the callback function

With the address from the server, all that's left is to update the web form. Since the address is stored in a form field, you can use the DOM again, similar to how you got the value of the phone number field in getCustomerInfo() way back on page 82.

function updatePage() 
 {
  if (request.readyState == 4) {
    /* Get the response from the server */
    var customerAddress = request.responseText;
    /* Update the HTML web form */
Here's where those id attributes come in handy again.
    document.getElementById("address").value =
Since address is a form field, you can
access the text in it using the "value" property.
      customerAddress;You're using the DOM again... this time to set a value
in the web form.Just set the field's value to the customer's address.
  }
}