var nextSibling = removal ? null : findNextSibling(target); 
var nextSibling = removal ? null : this.findNextSibling(target); 
    onMutateNode: function(event)    {        var target = event.target;        if (target.firebugIgnore)            return;        var parent = event.relatedNode;        var removal = event.type == "DOMNodeRemoved";        var nextSibling = removal ? null : findNextSibling(target);        this.context.delay(function()        {            try            {                 this.mutateNode(target, parent, nextSibling, removal);            }            catch (exc)            {                FBTrace.dumpProperties("html.onMutateNode FAILS:", exc);            }        }, this);    },
2454	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2454/6be3c6e9d225c8ad86a241df71727d654ddb2469/html.js/clean/extension/content/firebug/html.js