add: this._button.style.backgroundImage = enabled ? "url(?_twr_=ddButton.png)" : "url(?_twr_=ddDisabledButton.png)"; 
context:     setEnabled: function(enabled) {        this.$.setEnabled.apply(this, [enabled]);        if (enabled && !this._editAllowed) this._editor.readOnly = true;    },
meta: 5515	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5515/f1782c774313ba79c127ba5da30580c5ce1f4c32/DropDown.js/buggy/src/thinwire/render/web/resources/DropDown.js