function() {
        var el = this.input,
            checked;

        if (el) {
            checked = el.dom.checked;
            this._checked = checked;
        }

        return checked;
    }
function() {
        var el = this.input,
            checked;

        if (el) {
            checked = el.dom.checked;
            this._checked = checked;
        }

        return checked;
    }
function ( ) { var el = this . input , checked ; if ( el ) { checked = el . dom . checked ; this . _checked = checked ; } return checked ; }
Returns the `checked` value of this field
@return {Mixed} value The field value
Returns the checked value of this field