{ xtype:'gridcolumn', itemId: 'id', width: 90, align: 'center', dataIndex: 'id', text : '바로가기', renderer: function(value, meta, record, rowIndex, colIndex, store, view){ return Math.round(value/1000) + "Kb"; } } // renderer를 이용하여 replace // http://docs.sencha.com/extjs/4.2.2/#!/api/Ext.grid.column.Column 참조
