Code to update mysql database -- 2

I am looking for someone to write the JAVASCRIPT code that is used to update a mysql database record field upon change to text area box on webpage without refreshing the page. I only need the Javascript code and not the corresponding PHP code. I have created a sample page of output from a database: [login to view URL] and limited the output to 4 records. I would like to be able to type into the blank text area field shown and when done have the corresponding record in the mysql database updated with the new value. The ID to the text area field is equal to the IMG record number in the database. The project is for the following: Completed Javascript function that I can insert on the webpage that will be called using a onchange event for the textarea. The Javascript will need to get the ID number of the textarea and the content of the text area and post that information to a PHP page. The code should allow me to change the name of the PHP page. Please let me know the variable names that will be posted to the PHP page.