Goal:

Every time you make a input data in the textbox (named txtInputData) you send the data to the server automatically and you compare the input data to the database's table.

In the end you retrieve a true or false if the data of txtInputData is the same from the database.

Problem:

I don't know how to make the textbox to send the data to the server with json automatically in every time when you make a input data.

I don't know where to start? It sounds to be more complicated than I thought.

Info:

*Jquery with Json is recommended.