dojox mvc中的双向绑定 - 非dijit，parserExtention

I'm trying to create a "checkbox-tree" with dojox mvc , where unchecking the top most checkbox will uncheck the checkboxes below. The databinding for the initial state/value of the checkboxes works fine, but when I through code change the model items visible property to false (the checkbox checked is bound to this property), the checkboxes remains checked.I'm trying to create a "checkbox-tree" with doj