add:   this.addEventListener("mousedown", this._onmousedown); 
context: function QxMenuSeparator(){  QxWidget.call(this);    this._line = new QxWidget();  this._line.setCssClassName("QxMenuSeparatorLine");  this._line.setAnonymous(true);    this.add(this._line);};
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/65a768ae0b3df0060b82c244baee634cc54f5772/QxMenuSeparator.js/clean/qooxdoo/source/script/widgets/QxMenuSeparator.js