rem: return ioService.newURI(baseURI.resolve(url), null).spec; 
add: return ioService.newURI(baseURI.resolve(url), null, null).spec; 
context:     makeURLAbsolute : function ( base, url ) {        // Construct nsIURL.        var ioService = Components.classes["@mozilla.org/network/io-service;1"]                      .getService(Components.interfaces.nsIIOService);        var baseURI  = ioService.newURI(base, null);                return ioService.newURI(baseURI.resolve(url), null).spec;    },
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/001c56992ee35ac568bc06824783fb47eb04d672/nsContextMenu.js/clean/suite/common/nsContextMenu.js