can a class return both himself and an element?

[Luca Pillonel]

I have a class creating elements. I.E.

var Button = new Class({
        initialize : function(){
                this.button = new Element('div', {html : 'my button'});
                return this.button;
        },
        setContent : function(content){
                this.button.set('html', content);
        }
});

So i can create an element in my DOM like this :
var myButton = new Button().inject(document.body);

But how can I make
myButton.setContent('some new content');
?

Thank you