EXTJS4: Compare two fields in GridPanel with each other

Question

I have a Grid-Panel with a few columns. Now I want to set a new Class in a Column of a Row, when the values don't match with each other. But how can i get success to a column in a different row? Her is my code which I tried, but it says, the ID is undefined:

...{
    header: 'CRS',  
    dataIndex: 'crs',
    id:'crs',
    flex:1,
    renderer: function(value, meta) {

        console.log("csv-->"+Ext.getCmp('csv').value);

        if(value==Ext.getCmp('csv').value)
            {
                //change class
            }

    }
},
{
    header: 'CSV', 
    dataIndex: 'csv',
    id:'csv',
    flex:1
},...

Answer 1

I have it! This works for me:

{
    header: 'CSV', 
    dataIndex: 'csv',
    flex:1,
    renderer: function(grid, rowIndex, rowdata) {
        var csv_data=rowdata.data.csv;
        var crs_data=rowdata.data.crs;
        if (csv_data != crs_data) { 
           rowIndex.tdCls = "red-class";
        } 
            return csv_data;

    }
},