rem: if (this._focusBox.focus) this._focusBox.focus(); 
add: tw_setElementFocus(this._focusBox, true); 
context:     _setTabActive: function(index, active) {          var cl = this._children;        if (index < 0 || index >= cl.length) return;        var sheet = this._children[index];        sheet.setActiveStyle(active);                if (active) {            this._focusBox = sheet._tab;            if (this._focusBox.focus) this._focusBox.focus();            this._currentIndex = index;        }        var commonSize = active ? "0px" : this.getStyle("borderSize") + "px";        if (index == 0) this._tabs.style.paddingLeft = commonSize;                if (index > 0) cl[index - 1]._tab.style.borderRightWidth = commonSize;                if (index + 1 < cl.length) cl[index + 1]._tab.style.borderLeftWidth = commonSize;    },
meta: 5515	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5515/e9431945aad1bb6c8abb837f7717e01ca24ecd9f/TabFolder.js/clean/src/thinwire/render/web/resources/TabFolder.js