Change gridview row color on mouseover and mouseout in asp.net

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
       
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='Silver'");
            // This will be the back ground color of the GridView Control
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='White'");
        }
    }