Changing gridview row color on mouse hover

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes.Add("onmouseover", "self.MouseOverOldColor=this.style.backgroundColor;this.style.backgroundColor='#C0C0C0'");
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor=self.MouseOverOldColor");         
        }
    }