rem: var baseURL = this.createInstance( "@mozilla.org/network/standard-url;1", "nsIURL" );  baseURL.spec = base; 
add: var ioService = Components.classes["@mozilla.org/network/io-service;1"] .getService(Components.interfaces.nsIIOService); var uriToAdd  = ioService.newURI(base, null); 
context:     makeURLAbsolute : function ( base, url ) {        // Construct nsIURL.        var baseURL = this.createInstance( "@mozilla.org/network/standard-url;1", "nsIURL" );        // Initialize from base url.        baseURL.spec = base;        // Resolve        var result = baseURL.resolve( url );        return result;    },
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c306e0513b57b7c967a017b21debb35643000291/nsContextMenu.js/clean/xpfe/communicator/resources/content/nsContextMenu.js