var sourceRow = sourceLine.parentNode; 
var sourceRow = sourceLine.parentNode; 
    onMouseDown: function(event)    {        var sourceLine = getAncestorByClass(event.target, "sourceLine");        if (!sourceLine)            return;        var sourceRow = sourceLine.parentNode;                var sourceFile = sourceRow.parentNode.repObject;        var lineNo = parseInt(sourceLine.textContent);        if (isLeftClick(event))            this.toggleBreakpoint(lineNo);        else if (isShiftClick(event))            this.toggleDisableBreakpoint(lineNo);        else if (isControlClick(event) || isMiddleClick(event))        {            Firebug.Debugger.runUntil(this.context, sourceFile.href, lineNo);            cancelEvent(event);        }    },
2454	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2454/8237a6359bebacf3e34f1134ef713c687c8e3edb/debugger.js/buggy/extension/content/firebug/debugger.js