add: if (this._parent._box.style.top == "") this._parent._box.style.top = 0; 
context:     setY: function(y) {        if (this._parent instanceof tw_GridBox) {            var oy = y + parseInt(this._parent._box.style.top);                        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/2006/5515/1026d465202b7999f3b6da2f89669ab6d841d198/GridBox.js/buggy/src/thinwire/render/web/resources/GridBox.js