Feature detect base64 support for images in mootools

Browser.features.base64.js

(function() {
    var callback = function() {
        Browser.Features = Object.merge(Browser.Features, {
            base64: this.width == 1 && this.height == 1
        });
        
        // console.log(Browser.Features.base64); // true || false
    };
    
    new Element("img", {
        // 1x1 px gif to test with
        src: "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///ywAAAAAAQABAAACAUwAOw==",
        events: {
            load: callback,
            error: callback
        }
    });
})();

is it humanly possible to make more mistakes on a less-than-10 lines snippet? hopefully it's now done and dusted.