protected internal virtual void RenderHeader(HtmlTextWriter writer)
{
writer.AddAttribute(HtmlTextWriterAttribute.Id, ClientID + "_tab");
writer.AddAttribute(HtmlTextWriterAttribute.Class, "ajax__tab");
RenderBeginTag(writer);
writer.AddAttribute(HtmlTextWriterAttribute.Class, "ajax__tab_outer");
RenderBeginTag(writer);
writer.AddAttribute(HtmlTextWriterAttribute.Class, "ajax__tab_inner");
RenderBeginTag(writer);
writer.AddAttribute(HtmlTextWriterAttribute.Class, "ajax__tab_tab");
writer.AddAttribute(HtmlTextWriterAttribute.Id, "__tab_" + ClientID);
writer.AddAttribute(HtmlTextWriterAttribute.Href, "#");
writer.AddStyleAttribute(HtmlTextWriterStyle.TextDecoration, "none");
if(_owner.UseVerticalStripPlacement)
writer.AddStyleAttribute(HtmlTextWriterStyle.Display, "block");
writer.RenderBeginTag(HtmlTextWriterTag.A);
RenderBeginTag(writer);
if(_headerControl != null) {
_headerControl.Visible = true;
_headerControl.RenderControl(writer);
_headerControl.Visible = false;
} else {
writer.Write(HeaderText);
}
writer.RenderEndTag();
writer.RenderEndTag();
writer.RenderEndTag();
writer.RenderEndTag();
writer.RenderEndTag();
}