protected override void Render(HtmlTextWriter writer) { if (!string.IsNullOrEmpty(this.ID) && this.Text.Length == 0) { string helpText = string.IsNullOrEmpty(LocalizationUtility.GetHelpText(this.ID)) ? LocalizationUtility.GetHelpText("noHelp") : LocalizationUtility.GetHelpText(this.ID); this.Attributes.Add("onmouseover", string.Format(Overlib.TOOLTIP, helpText)); this.Attributes.Add("onmouseout", Overlib.MOUSEOUT); } base.Render(writer); }