protected override void OnPreRender(EventArgs e)
        {
            //default button
            this.txtSearchTerms.Attributes.Add("onfocus", string.Format("if(this.value=='{0}')this.value=''", GetLocaleResourceString("Forum.SearchForumsTooltip")));
            this.txtSearchTerms.Attributes.Add("onkeydown", "if(event.which || event.keyCode){if ((event.which == 13) || (event.keyCode == 13)) {document.getElementById('" + btnSearch.ClientID + "').click();return false;}} else {return true}; ");

            //advanced search
            this.hlAdvSearch.NavigateUrl = SEOHelper.GetForumAdvancedSearchUrl();

            base.OnPreRender(e);
        }