database:sql.js the note demo

question query:

1.to create notes from html page

(1)input from textarea label,

(2) save button,finish the function of write it into data base(INNSERT)

2.save it to database

(1)a button with js function

3.read it

(1 select them from database(files),how? SELECT FROM? how to do in detail

(2

4.edit it (change it)

(1 a button with js function to change the note data in database file(notedata.js) 

the techs which need to get now:

a.how to write data from html and transport it into notedata.js?

b.how to read data from notedata.js into html page?