[Moo] Troubles with bind(this)

[rpflo]

in a class I've got this:

initialize : function(imgs,options){
        this.setOptions(options);
        this.imgs = $$(imgs);
        // more code
},


getDimensions : function(){
        // other code
        this.imgs.each(function(index){
                imgWidth[index] = this.imgs[index].getSize().x;     // here's 
the
issue
        }.bind(this));
}

Debugging tells me "this.imgs[index].getSize().x is not a function".

I'm sure this is a problem with binding, how do I bind this.imgs
inside of the each function?