Simpler JS for you

simpler.js

// when the document is fully loaded, run this function
$(document).ready(function(){
  // find every checkbox
  $('input[type="checkbox"]')
    // and bind to the click method to run this function
    .click(function(){
    // create a variable called "box_value" which has the string from the current element's "value" attribute.
    // $(this), in the current context, refers to the input-checkbox that is experiencing a click event
    var box_value = $(this).attr("value"); 
    // since the "value" matches the class name, we can start a selector $() which combines a dot and the box_value variable to form a proper class name.
    // Then we toggle!
    $('.'+box_value).toggle();
  });
});