How to store interactive dom values on a server with javascript and not PHP

I wrote an "front end" javascript application that has DOM events in the form of JQuery sliders. I would like to store the user entered values of the sliders on a server.So in short a user would move the sliders, click a button and the slider values would be saved on the server.

Now I know the way to do this with PHP is to have the save button launch a php script that would save the information as tables in a MYSQL database for later retrieval.

However, I would like to do it all in Javascript.

I have read a bit about Node.js and Mongo DB and have a vague idea that it's possible, but I'm not clear. I've tried to find AJAX-ish code examples that launch Javascript (or hook to node.js or Mongo DB????) in a way that seems similar to conventional usage of PHP/MYSQL but I am having trouble weeding through the clutter.

Is this possible and what technologies are available to make it happen?