gistfile1.js

Class.extend({
  callback: function() {
    if(arguments.length == 0 || typeof arguments[0] != "string") { throw "You must specify a method name (as a String)"; };
    var self = this,
        args = Array.prototype.slice.call(arguments),
        name = args.shift(),
        meth = self[name];
    if (typeof meth === 'function') { return function curriedMethod() {
        return meth.apply(self, args.concat(Array.prototype.slice.call(arguments)));
      };
    } else {
      throw "Method "+ name +" not found!";
    };
  }  
});

// Usage

var Dog = new Class({
  bark: function(event) {
    // Method body here...
  }
});

var myDog = new Dog();

$('element').on('click', myDog.callback('bark'));