var captures = (function() {

	var path = "/tsp/";

	var comments = path + "delete/capture:captureId/comment:commentId"

      // you return a closure object with key => values where the values are the functions and the keys are the names of the functions
     // everything in js is an object with a prototype. that prototype is defined as just a hash of keys and values {}    var  o = { foo: 1 };
     // you can return objects to. here our are closing over some properties defined in your captures function encapsulated in new functions
      return {
        addComment: function(id, timestamp, text) {
		alert('add comment');
	},

        deleteComment: function(captureId, commentId, success, error) {
		var url = comments.replace("captureId",captureId).replace("commentId",commentId);
		var post = {
			type:'POST',
			url: url,
			success: success,
			error: error
		};
		$.ajax(post);
	}
     };

})();