select a row based on the dropdownlist value or text

Hello again,
how can i select a grid row,based on the value or the text of a dropdownlist?

first of all,i looked over the demo api on kendo site, and the code
@{
    ViewBag.Title = "GridApi";
}

<h2>GridApi</h2>
<div id="grid"></div>
<script>
    $("#grid").kendoGrid({
        columns: [
    { field: "name" },
    { field: "age" }
  ],
        dataSource: [
    { name: "Jane Doe", age: 30 },
    { name: "John Doe", age: 33 },
  ]
    });
    var grid = $("#grid").data("kendoGrid");
    var row = grid.tbody.find("tr:eq(0)"); OR variant 2: var rowIndex=1;row = grid.tbody.find(">tr:not(.k-grouping-row)").eq(rowIndex);
    var data = grid.dataItem(row);
    grid.select(row);
    console.log(data.name); // displays "Jane Doe"
</script>

i attached a picture with the error in firebug.