使用母版页后台控制样式

1  HtmlGenericControl li = (HtmlGenericControl)this.Master.FindControl("HHB");
2                 li.Attributes.Add("class", "dropdown active");
3                 HtmlGenericControl ul123 = (HtmlGenericControl)this.Master.FindControl("HHBul");
4                 ul123.Style.Add("display", "block");
5                 LinkButton lbt = (LinkButton)this.Master.FindControl("LinkButton5");
6                 lbt.CssClass = "dul_active";