Input: A text string, using prompt.
Output: Either "Valid name" or "Invalid name", depending on whether the input names fit the required format, which is

Last name, first name, middle initial

where neither of the names can have more than 15 characters.

Write, test, and debug (if necessary) JavaScript scripts for the problem that above. When required to write a function, you must include a script to test the function with at least two different data sets. In all cases, for testing, you must write an HTML file that references the JavaScript file.