rem: bs.visibility = "visible"; 
add: bs.display = "block"; 
context:     setActiveStyle: function(active) {          var bs = this._box.style;        var s = this._tab.style;        var borderSize = this.getStyle("borderSize");                if (active) {            var margin = 0;            bs.zIndex = 1;            bs.visibility = "visible";            s.height = tw_TabFolder._tabsHeight + (tw_sizeIncludesBorders ? borderSize : margin) + "px";            s.paddingLeft = "4px";            s.paddingRight = "4px";        } else {            var margin = 2;            bs.zIndex = 0;            bs.visibility = "hidden";            s.height = tw_TabFolder._tabsHeight - (tw_sizeIncludesBorders ? borderSize : borderSize + margin) + "px";            s.paddingLeft = "2px";            s.paddingRight = "2px";        }        s.marginTop = margin + "px";        tw_setFocusCapable(this._tab, active);    },    
meta: 5515	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5515/24e02545b42a490e7acd2cb4e45328f823b29e40/TabSheet.js/clean/src/thinwire/render/web/resources/TabSheet.js