I am creating a JavaScript class. Some of the methods contain AJAX calls using JQuery. The problem I am comming accross is that I cannot use the this keyword within the AJAX callbacks due to a change in scope. I have come up with a hackey solution, but I am wondering what is the best practice way around this?

Here is an example:

var someClass = function() {

   var someElement = $('form');

   this.close = function() {
      someElement.remove();
   };

   this.query = function() {
      $.ajax({
         url: someurl,
         success: function() {
            this.close(); // does not work because `this` is no longer the parent class
         }
      });
   };
};