rem: var oy = y + this.getParent().getY(); 
add: var oy = y + this._parent._y; 
context:     setY: function(y) {        if (this._parent instanceof tw_GridBox) {            var oy = y + this.getParent().getY();                        if (this._root.getParent() instanceof tw_BaseContainer && this._root === this._parent) {                var win = this.getBaseWindow();                if (win instanceof tw_Dialog) oy += win.getOffsetY();            }                        arguments.callee.$.call(this, oy);            this._y = y;                } else {            arguments.callee.$.call(this, y);        }    },
meta: 5515	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5515/d532c0ea03ef1c91856bba5408f049541b39c2ba/GridBox.js/buggy/src/thinwire/render/web/resources/GridBox.js