add:     div = div.labelElement || div;  
context:     singleClick: function(evt) {        var div = Event.element(evt);        var layer = div.layer;        if (this.mode == "radio") {            for(var i=0; i < this.backdrops.length; i++) {                this.setTabActivation(this.backdrops[i], false);                this.backdrops[i].layer.setVisibility(false);            }            this.setTabActivation(div, true);            layer.setVisibility(true);        } else {            var visible = layer.getVisibility();                        this.setTabActivation(div, !visible);            layer.setVisibility(!visible);        }        Event.stop(evt);    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1027/e023b4c075e61103f68302b293c4b8987ddb05b4/LayerSwitcher.js/buggy/lib/OpenLayers/Control/LayerSwitcher.js