Javascript Prototype Pattern with Default Options

gistfile1.js

var Slideshow = (function($) {   
    function Slideshow(options) {
        
        var defaults = {
            timeout: 0.5,
            selector: '.content'
        };
        
        this.options = $.extend(defaults, options);
    };

    Slideshow.prototype.alertSelector = function() {
        console.log(this.options.timeout);
    };
    
    return Slideshow;
})(jQuery);

var slideshow = new Slideshow({
    timeout: 0.9
});
slideshow.alertSelector();​