An Ajax request is sent with each modification to the input field and a server
response returned to indicate the validity of the catalog ID.
If a catalog id is specified that is already specified in the database, a server response
indicates that the catalog id is not valid. For example, specify catalog id as catalog1 .
The validation message "Catalog Id is not Valid" gets displayed. The form fields get
filled with column values for the catalog1 catalog entry and the Submit button gets
disabled. Field values getting filled is an example of auto-completion.