selected cell in datagrid want to change color

I have changed the below code in the above url i gave already, substitute the below code on gridview's "RowDataBound" event and let me know:

  protected void gvEmployee_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                int cnt = e.Row.Cells.Count;
                for (int i = 0; i < cnt; i++)
                {
                    e.Row.Cells[i].Attributes.Add("onclick", "javascript:ChangeRowColor('" + e.Row.Cells[i].ClientID + "')");
                }
            }

        }