rem: this.opacity = opacity; for(var i=0; i<this.div.childNodes.length; ++i) { var element = this.div.childNodes[i].firstChild; OpenLayers.Util.modifyDOMElement(element, null, null, null, null, null, null, opacity); 
add: if (opacity != this.opacity) { this.opacity = opacity; for(var i=0; i<this.div.childNodes.length; ++i) { var element = this.div.childNodes[i].firstChild; OpenLayers.Util.modifyDOMElement(element, null, null, null, null, null, null, opacity); } 
context:     setOpacity: function(opacity) {        this.opacity = opacity;        for(var i=0; i<this.div.childNodes.length; ++i) {            var element = this.div.childNodes[i].firstChild;            OpenLayers.Util.modifyDOMElement(element, null, null, null,                                              null, null, null, opacity);        }    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/1603d5a8ba7dfaaa2dc66305ecce6bf0c8d5b4fc/Layer.js/clean/lib/OpenLayers/Layer.js