add: tree.database.RemoveDatasource(HTTPIndex); 
context: function DoUnload(){	var tree = document.getElementById("tree");	if (tree)	{		tree.database.RemoveObserver(RDF_observer);	    debug("Directory: removed observer\n");	}}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/354fcc0505077145ce5f4d61eed534cb55155cf9/directory.js/clean/suite/common/directory/directory.js